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Class 10 > Learn Mathematics > If a coin is tossed for a certain number of times....
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If a coin is tossed for a certain number of times. How many times the coin was tossed, if the probability of getting a head is 0.4 and it appeared up for 24 times?

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Math Magacian

60.
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atics pecialise in mba / economics students of all levels

Answer of n =60, since p(h)=0.4 , and n=24= total no of head appearances, then we get equation , 0.4 n = 24 / n, solving fr n total appearances 0.4 n =24 .. eq (1) or 4n =240 or n=240/4=60 total appearances , is the required answer .. Dr K S Velmurugan Quantitative methods Teacher Pondicherry
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atics pecialise in mba / economics students of all levels

Answer of n =60, since p(h)=0.4 , and n=24= total no of head appearances, then we get equation , 0.4 n = 24 / n, solving fr n total appearances 0.4 n =24 .. eq (1) or 4n =240 or n=240/4=60 total appearances , is the required answer .. Dr K S Velmurugan Quantitative methods Teacher Pondicherry
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Probability of an event = No. Of favourable occurrences / Total no. Of occurrences of all possible events Let 'n' be the total no. Of times the coin is tossed. Given probability of success of a head appearing = 0.4 Given the no. Of times 'head' appeared = 24 So, 0.4 = 24 / n n = 24 / 0.4 So, n = 60.
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Probability of an event = No. Of favourable occurrences / Total no. Of occurrences of all possible events

Let 'n' be the total no. Of times the coin is tossed.

Given probability of success of a head appearing = 0.4

Given the no. Of times 'head' appeared = 24

So, 0.4 = 24 / n

n = 24 / 0.4

So, n = 60.

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