A bag contains 6 white and 4 black balls. Two balls are drawn at rando

1.	A bag contains 6 white and 4 black balls. Two balls are drawn at random. Find the probability that they are of same colour.
Answer» 7/15 Number of ways two BALLS can be DRAWN from 10 balls(6 white +4 blacks)= 10C2=(109)/(21)=45 n(E)=Number of ways of drawing 2 balls from 6 white balls or 2 balls from 4 BLACK balls=6C2+4C2=21 P(E)=21/45=7/15

A bag contains 6 white and 4 black balls. Two balls are drawn at random. Find the probability that they are of same colour.

Answer»

7/15

Number of ways two BALLS can be DRAWN from 10 balls(6 white +4 blacks)= 10C2=(10*9)/(2*1)=45
n(E)=Number of ways of drawing 2 balls from 6 white balls or 2 balls from 4 BLACK balls=6C2+4C2=21
P(E)=21/45=7/15

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A bag contains 6 white and 4 black balls. Two balls are drawn at random. Find the probability that they are of same colour.

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