On a multiple choice test with 21 questions, each question has four possible answers, one of which is correct. for students who guess at all answers, find the standard deviation for the number of correct answers

A brown-eyed father and a green-eyed mother have a 25% chance of having a green-eyed child, what is the probability that, in a family of four children, 3 of them have green eyes?

Rewrite the fraction in the sentence below as a percentage. Of the markets in a certain city, 7/10 offered customers a salad bar in 1998.

Ben is greeting customers at a music store. Of the first 20 people he sees enter the store, 9 are wearing jackets and 11 are not.

Give me an example for algebraic expressions

A bag of marbles contains 3 yellow marbles, 4 blue marbles, and 8 orange marbles. Which of the following is true of selecting a green marble? Select all that apply. The probability is 7/15 This event is very likely to happen.

a store has some sale on let supplies the price of each item is marked down 25% the store also offers a coupon for 5 off for when you check out write an expression that represents the final price after a customer uses the coupon

T increased by r the answer

to multiply a number by 12, Carter likes to multiply the number by 10 and then multiply it by 2 and add the product. Write an expression with parenthesis how carter would solve 12*16

How do you solve Precents of

39/51 change to lowest terms