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Three coins are tossed simultaneously 200 times with the following frequencies of different outcomes:

If the three coins are simultaneously tossed again, compute the probability of 2 heads coming up.

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925

259

725

257

answer is A.

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Detailed Solution

Given that three coins are tossed 200 times.
Total number of tosses = 200
Let an event A be the probability of 2 heads coming up.
The number of times 2 heads occur = 72
Using the formula of probability,

Probability of event A = No . of favourable outcomes Total no  of outcomes

⇒ P(A) = No . of times 2 heads occur Total no, of tosses

Putting values in above expression we get,

⇒ P(A) = 72200 ⇒ P(A)= 925

Hence the probability of 2 heads coming up is

925

.
Therefore the answer is option (1).

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