On a particular production line, the likelihood that a light bulb is defective is 5%. Ten light bulbs are randomly selected. What is the probability that none of the light bulbs will be defective?

Alison has all her money invested in two mutual funds A and B. She knows that here is 40% chance that fund A will rise in price and 60% chance that fund B will rise in price given that fund A rises in price. There is also a 20% chance that fund B will rise in price. What is the probability that at least one of the funds will rise in price?

The number of cars sold by a car salesperson during each of the last 25 weeks is the following.

Number of cars sold	Frequency
0	10
1	10
2	5

Whatis the expected number of cars sold by the salesperson during a week?

An exam has 10 multiple-choice questions. Four alternatives are given in each of the questions in which only one is correct. Jasmine didn't have time in preparing for this exam and decided to fill the answer out pure randomly. What is the probability that she could get at least six questions correct in this exam?

Request: Please solve above questions with excel formula. Thank you.