Residents in a city are charged for water usage every three months the water bill is computed from a common fee along with the a
mount of water the customers use the last water bills 440 neighborhood residents are displayed in the histogram below.
A) $150-$175 B)$175-$200 C) $200-$225 D) $225-$250
A) $150-$175 B)$175-$200 C) $200-$225 D) $225-$250
1 answer:
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Answer: The probability that she gets a ride 3 times in a 5-day work week is <u>0.31</u>.
The probability that she gets a ride at least 2 times in a 5-day workweek is <u>0.97</u>.
Step-by-step explanation:
By binomial distribution formula:
, where n is the number of trials , r is the number of success, p is the probability of success and q is the probability of failure.
Given : n=5
p = 0.7
q= 1-0.7=0.3
Now, the probability that she gets a ride 3 times in a 5-day work week :
The probability that she gets a ride at least 2 times in a 5-day workweek :