Bank Exam Government Jobs Exams Logical Reasoning General Mental Ability

a bag contains 5 white,7 red and 8 black balls.if 4 balls are drawn with replacement,what is the probability that all are white

Read Solution (Total 2)

(5/20)*(5/20)*(5/20)*(5/20)=1/256
10 years agoHelpfull: Yes(2) No(1)

Answer :- 1/256

Solution:-
Total balls in bag= 5+7+8 = 20
Now, Probability of drawing one white ball from bag= 5/20 = 1/4
As balls 4 are drawn one by one with replacement, therefore :-
Probability of drawing four white ball can from bag= 1/4 * 1/4 * 1/4 * 1/4 = 1/256
10 years agoHelpfull: Yes(2) No(0)

Bank Exam Other Question

if two dices are tossed simultaneously the number of elements in the resulting sample space is
a)6 b)8 c)36 d)24 Q. The average of 3 numbers is 135.The largest number is 180 and the difference between the others is 25.the smallest number is:

Option
A)130
B)125
C)120
D)100