Find the indicated probability. Round to three decimal places.
-Find the probability of at least 2 girls in 8 births. Assume that male and female births are equally likely and that the births are independent events.
A) 0.035
B) 0.109
C) 0.855
D) 0.965

Question

Quizplus · Accepted Answer

The probability of at least 2 girls in 8 births can be found by calculating 1 minus the probability of having 0 or 1 girl. Using the binomial probability formula, the probability of 0 girls is (0.5)^8 and the probability of 1 girl is 8*(0.5)^8. Adding these probabilities and subtracting from 1 gives approximately 0.965.

Find the Indicated Probability