two coins are tost 400 times 2 head comes 130 times 1 head comes 105 times find the probability getting 1 head and zero head ???
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Answer:
Given,
Total number of events = 400
(a) No. of times two heads occur = 112
Probability of getting two heads = 112/400 = 7/25
(b) No. of times one heads occur = 160
Probability of getting one heads = 160/400 = 2/5
(c) No. of times no heads occur = 128
Probability of getting no heads = 128/400 = 8/25
Total number of events = 400
so ,
(a) No. of times two heads occur = 112
Probability of getting two heads = 112/400
= 7/25
(b) No. of times one heads occur = 160
Probability of getting one heads = 160/400
= 2/5
(c) No. of times no heads occur = 128
Probability of getting no heads = 128/400
= 8/25
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