Question

The probability a red marble selected at random from a jar containing p red, q blue and r green marbles is

Options

• `"q"/("p" + "q" + "r")`

• `"p"/("p" + "q" + "r")`

• `("p" + "q")/("p" + "q" + "r")`

• `("p" + "r")/("p" + "q" + "r")`

Answer 1

`"q"/("p" + "q" + "r")`

Explanation;

Hint:

Sample spaces = p + q + r

Let A be the event of getting red

n(A) = p

P(A) = `"q"/("p" + "q" + "r")`