UrbanPro

Take Class 9 Tuition from the Best Tutors

  • Affordable fees
  • 1-1 or Group class
  • Flexible Timings
  • Verified Tutors

Search in

At a party, everyone shook hands with everybody else. There were 66 handshakes. How many people were at the party? A: 30 B: 12 C: 14 D: 25

Asked by Last Modified  

3 Answers

Learn Class 9 +1  Class 10 Situational problems based on quadratic equations.

Follow 4
Answer

Please enter your answer

Maths and Science Grade 8-10 SSC and CBSE tuitions

B 12
1 Comments

An Engineer

Use the sum of AP series concept, where Sn= 66, first term a1=1, common difference d=1, then find n. Putting all the values in the formula of Sn we get, n^2+n-132=0 Required answer= n+1 which will come to be 12 (OPTION B)
Comments

If there are N people then there would be shakehands with N-1 people. N(N-1)/2 = 66 N^2 - N - 132=0 N=12 people in the party. Option B is the right answer.
Comments

View 1 more Answers

Related Questions

Find the product: (x – 3y) (x + 3y) (x2 + 9y2)
The product of the first two terms is x^2 - 9y^2. The third term is x^2 + 9y^2 So the final product is x^4 - 81y^4
Sowmitra
0 0
5
Do I need tuition for the class 10 boards?
It completely de.pends on your requirement. You could try solving a few sample papers to assess where your strong and weak points are. Accordingly decide if you need help for a particular subject. It is...
Saravanan
0 0
5
Which is the most common form of democracy? (Class-9)
The common form of democracy is representative democracy where people select their representative for their country for a fixed period of time.
Ankit
If a right circular cone has radius 4 cm and slant height 5 cm then what is its volume?
apply pythagoras theorem (height of cone)^2 + 4^2=5^2 height of cone = 3 volume of cone = 1/3*22/7*r^2*height of cone volume of cone = 50.27 cm^3
Raj
0 0
6
What will happen if yeast powder is put in sugar solution and kept for few hours? Name the process.
When yeast powder is put in sugar solution and kept for few hours, fermentation takes place. The sugar is converted into alcohol by yeast and this process is known as Fermentation.
Rohit
0 0
5

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons


Numerical problems on Newton's Laws of Motion
Type 1: Question 1: Calculate the force needed to speed up a car with a rate of 5ms–2, if the mass of the car is 1000 kg. Solution: According to question: Acceleration (a) = 5m/s2 and Mass (m)...

उपपद विभक्ति (सप्तमी)
निर्धारण में सप्तमी विभक्ति यतश्च निर्धारणम् ।। 2 ⁄ 3 ⁄ 41 ।।(अधिकरण कारकम् ) जाति‚ गुण‚ क्रिया‚ संज्ञा एतेषां विशेषताधारेण कस्यचित् कस्माचित् समुदायात्...


Recommended Articles

Once over with the tenth board exams, a heavy percentage of students remain confused between the three academic streams they have to choose from - science, arts or commerce. Some are confident enough to take a call on this much in advance. But there is no worry if as a student you take time to make choice between - science,...

Read full article >

While schools provide formal education to the children, the home is where they start learning about things informally. Parents think that schools will take the initiative to educate their children. Well, this is partially true, as parents also play an essential role in bringing up their child. For the development of particular...

Read full article >

Learning for every child starts from a very young age. While the formal methods include school curriculums and private lessons, the informal methods include dancing, music, drawing, and various fun-filling activities. Playing games and practising these types of activities helps the children get out of boredom and...

Read full article >

With the mushrooming of international and private schools, it may seem that the education system of India is healthy. In reality, only 29% of children are sent to the private schools, while the remaining head for government or state funded education. So, to check the reality of Indian education system it is better to look...

Read full article >

Looking for Class 9 Tuition ?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you
X

Looking for Class 9 Tuition Classes?

The best tutors for Class 9 Tuition Classes are on UrbanPro

  • Select the best Tutor
  • Book & Attend a Free Demo
  • Pay and start Learning

Take Class 9 Tuition with the Best Tutors

The best Tutors for Class 9 Tuition Classes are on UrbanPro

This website uses cookies

We use cookies to improve user experience. Choose what cookies you allow us to use. You can read more about our Cookie Policy in our Privacy Policy

Accept All
Decline All

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 55 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 7.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more