1 and a half collection of 18 balls is
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7th
Maths
Data Handling
Chance and Probability
Three balls are drawn at ra...
MATHS
Three balls are drawn at random from a collection of 7 white, 12 green and 4 red balls. The probability that each is different colour is
A
25348
B
25364
C
25323
D
25356
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ANSWER
The number of ways drawing one white, one green and one red ball =7C1×12C1×4C1
=7×12×4
=336
Total number of balls =7+13+4=23
The probability of drawing one white, one green and one red ball =23C3336
=3×2×123×22×21