Question

I'll MArk as brainliest...

Answer 1

Hey,

No. of black balls= 5
No. of red balls= 7
Total no. of balls= (5+7) = 12

We know that,

P(E) = No. of favourable outcomes/ Total no. of outcomes

(1.) P(Red ball) = 【7/12】

(2.) P(Black ball) = 【5/12】

(3.) P(not black ) = 1-probability of black
= 1- 5/12
= 【7/12】

HOPE IT HELPS:-))

Answer 2

Number of black balls= 5
Number of red balls   = 7
Total number of balls =5+7
                                  = 12

Here we know that,

Probability = number of favourable outcomes/ Total number of outcomes

so,

1.Probability of Red ball = 7/12

2. Probability of Black ball = 5/12

3.Probability of not black  = 1-probability of black
                                          = 1- 5/12