Please include working out. =D You will get 30 points for it.

It should be c

Step-by-step explanation:

Your formula is

Number of color ball/total ball

so 8/20 x 7/19 x 3/18 then convert to fraction

The probability the first ball is red is 0.4 or 8/20 or 2/5

The probability the next is blue is 7/19

The probability of the next being white is 6/18 or 1/3.

Multiply them together because these are independent events that must all occur and we get 2*7*1= 14 as the numerator

5*19*3=285 for a total probability of 14/285.

d) the triangle is a right triangle 60 squared +144 squared= 156 squared

step-by-step explanation:

156 squared is the hypothenuse

so 156= c

step-by-step explanation: