Question

There is a bag with only red marbles and blue marbles. The probability of randomly choosing a red marble is 7/10 . There are 42 red marbles in the bag and each is equally likely to be chosen. Work out how many marbles in total there must be.

Answer 1

Step-by-step explanation:

What is the probability that Maria will pick two red marbles if she returns the first marble to the bag? p((red))p((red))=(4/8)(4/8) answer: A.

Answer 2

Answer:

Correct answer:

Note that there are 16 total marbles. A is simply a set of sequential events. On the first, you have 10/16 chances to draw a red. Supposing this red is not replaced, the chance of drawing a second red will be 9/15; therefore, the probability of A is (10/16) * (9/15) = 0.375.

Step-by-step explanation:

JUST AN EXAMPLE GIVEN

PLZ MARK AS BRAINLIEST