Question

a bag contains 4 red , 6 black and 5 white balls . find the probability that the ball drawn is red or black

Answer 1

Answer:

(i)  4 / 15 ( red ball only)

(ii) 2 / 5 ( black ball only )

(iii) 1 / 3 ( white ball only )

(iv) 2 / 3 ( black or red ball )

Step-by-step explanation:

total balls = 4 + 6 + 5 = 15 balls\

red balls = 4

black balls = 6

white balls = 5

(i) probability = red balls  / total balls = 4 / 15

(ii) probability = black balls / total balls = 6 / 15 or 2 / 5

(iii) probability =  white balls / total balls = 5 / 15 or 1 / 3

(iv) probability =  black balls +  red balls / total balls = 4 + 6 / 15 = 10 / 15

or 2 / 3