Question

Three coins are tossed simutaneously 250 times and following frequencies of the outcomes were recorded:


Out come. Frequency.
3 heads 23
2 heads 72
1 head 77
No head 78

If coins are tossed again:
(a) find the probability of getting no head.
(b) find the probability of getting at least 1 head.

Answer 1

Done......................

Answer 2

a) Probability = No: of times it occurred / Total no: of outcomes

No : of times no head came = 78

Total number of times the coin is tossed = 250
Probability = 78 / 250

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b)probability of getting at least 1 head = 77 + 72 + 23 /250 = 172 / 250