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a bag contain 10 balls of which 6 are red and the rest are white and blue and of equal numbers. if a ball is picked at random. find the probability that is:

(a) either white or red 

(b) not red 

(c) blue or red 

(d) white

 Nov 24, 2020
 #1
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6 are red

2 are white

2 are blue

 

a)  P (white or red)  = 2/10  + 6/10  =  8/10   = 4/5

 

b) P (not red)  =  1  - P(red)  =   1  -  6/10  =   4/10  =  2/5

 

c) P (blue or red)  = (2/10  + (6/10)  = 8/10 =  4/5

 

d) P (white)  = 2/10  =  1/5

 

 

cool cool cool

 Nov 24, 2020

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