Solve the problem. Round to four decimal places.
-A recent study suggested that 70% of all eligible voters will vote in the next presidential election. Suppose 20 eligible voters were randomly selected from the population of all eligible voters. Use a
Binomial probability table to find the probability that more than 10 but fewer than 16 of the 20
Eligible voters sampled will vote in the next presidential election.
A)0.649
B)0.780
C)0.714
D)0.845

Question

Quizplus · Accepted Answer

The probability of more than 10 but fewer than 16 voters voting is found by calculating the binomial probabilities for 11, 12, 13, 14, and 15 voters voting and summing these probabilities. Given the success probability (p) of 0.70 for each trial and n = 20 trials, the sum of these probabilities equals 0.714 when rounded to four decimal places.

Solve the Problem. Round to Four Decimal Places