Infosys Company Numerical Ability Probability

6 red chips, 7green and 8 blue chips are in a bag if 5 are drawn with replacement .What is the probability that at least 3 are red?

Read Solution (Total 3)

((6C3*15C2)+(6C4*15C1)+6C5)/21C5
11 years agoHelpfull: Yes(25) No(3)

((6^3*15C2)+(6^4*15C1)+(6^5))/21C5
10 years agoHelpfull: Yes(2) No(1)
3R2G+3R2B+3R1G1B+4R1G+4R1B+5R
=6C3*7C2+6C3*8C2+6C3*7C1*8C1+6C4*7+6C4*8+6C5=1243
10 years agoHelpfull: Yes(2) No(0)

Infosys Other Question

In a box there are 13 white chips, 7 blue chips, 6 green chips. Two chips are drawn in succession. What is the probability that the two chips contain one white chip and one blue chip?
option
a) 7/50
b) 8/30
c) 7/25
d) 20/26
3 mangoes and 4 apples cost 85 rupees.5 apples and 6 peaches cost 122 rupees.6 mangoes and 2 peaches cost 114 rupees. What is the sum of cost of 1 apple, 1mango, and 1 peach?