Question

a box contains 7 red 8 white and 5 green marbles one marbles is drawn find the P of (i)red
(ii) not green
(iii)green
(iv) white or red

please give step by step method​

Answer 1

Answer:

Total number of observation = 20

(i) 7/20

(ii) 15/20 = 3/4

(iii) 5/20 = 1/4

(iv) 15/20 = 3/4

Answer 2

Answer:

P(A)=15/20=3/4

P(B)=5/20=1/4

P(C)=15/20=3/4