two unbiased coins are tossed simultaneously.find the probability of getting'No heads'.(A)1/4 (B)3/4 (C) 1/2 (D) 3/2.
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Total outcomes are 4 ( TT TH HT HH)
Favourable outcome (no head) is 1 (TT)
The probability of getting no head = 1/4
A) 1/4 is correct
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When 2 unbiased coins are tossed:
Total outcomes=HH,HT,TH,TT
Number of total outcomes=4
Favourable outcomes=TT
Number of favourable outcomes=1
Probability of getting no heads=Number of favourable outcomes/Number of total outcomes=1/4
Correct answer:
a)1/4
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