In a math class there are 3 girls and 5 boys. The teacher asks a volunteer to come to the board. What is the probability that the student is a girl? 5/8 3/8 3/5 5/3
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A point charge of +3.00 × 10−6 C is 12.0 cm distant from a second point charge of −1.50 × 10−6 C. Calculate the magnitude of the force on each charge.
Assume that women’s heights are normally distributed with a mean 64.5 in, and a standard deviation of 2.3 in. a. if 1 woman is randomly selected, find the probability that her height is less than 65 in. b. if 46 women are ...
A certain group of welfare recipients receives benefits of $90 per week with a standard deviation of $15. If a random sample of 20 people is taken, what is the probability that their benefit will be greater than $100 per ...
a homework consist of 40 independent problems is given. on the average, it takes 5 minutes to solve a problem, with a standard deviation of 2 minutes. find the probability that the home work will be completed in less than ...
A number is selected randomly from the set of integers 1 to 20 inclusive. What is the probability that the number is either a multiple of 3 or a multiple of 5?
A number is selected randomly from the set of integers 1 to 20 inclusive. What is the probability that the number is equal to or greater than 15?
A number is selected randomly from the set of integers 1 to 20 inclusive. What is the probability that the number is a prime number?