Please see images for Question 20 and Question 21. Thank you! Find the probabili

Question

Please see images for Question 20 and Question 21. Thank you!

Find the probability of a couple having a baby boy when their fourth child is born, given that the first three children were all boys. Assume boys and girls are equally likely. Is the result the same as the probability of getting all boys among four children? The probability is(Type an integer or a simplified fraction.) The probability is DType an integer or a sin plified fraction ) Is this result the same as the probability of getting all boys among four children? A. No. The two events are complements. B. Yes. The events are all independent. O C. No. The second event involves more possible outcomes. 0 D. Yes. The final result in each case is the same.

Explanation / Answer

Q20 (a) Probability will not depend on the previous events , So Probability will be 1/2

(b) Correct Option is C. The second event probability will be = (1/2*1/2*1/2*1/2) = 1/16

Q21

(a) P(Negative /Not have Disease )

= 138/(138+24)

= 0.852

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