Question

please tell this answer

Answer 1

1 .the answer is 42/200 ,21/100
2.the answer is 35/200,7/40

Answer 2

to get atleast 2 heads, we need 0 tails + 1 tail no. of observations
which is 80 = 35 + 45
therefore for 1st question the answer is 80/200
= 2/5

for second question we need only 0 tails no. of observations
which is 35
therefore the probability is 35/200
= 7/40

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