Question

7) Suppose one has a box with 3 red, 2 black and 5 white balls. Each time a ball
is drawn, it is returned to the box. What is the probability of drawing?
i) Either a red or a black ball?
ii) Either a white or a black ball?​

Answer 1

Answer:

i) 1/2. II) 7/10

Step-by-step explanation:

i) Number of red+black balls/ total balls

=3+2/10=5/10=1/2

II) number of white + black balls/total balls

=5+2/10=7/10

Answer 2

Answer:

Answer is:

i) 1/2

ii) 7/10

Step-by-step explanation:

Total no. of balls = 3 + 2 + 5

= 10 balls

i) No. of red balls + No. of black balls / Total no. of balls = 3 + 2 / 10 = 5 / 10 = 1 / 2

ii) No. of white balls + No. of black balls / Total no. of balls = 7 / 10