14. A bag contains 7 blue balls and 5 yellow
balls. If two balls are selected at random,
what is the probability that none of is
yellow?
Answers
Answered by
9
Heyaa☺
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Given,
Blue balls = 7
Yellow balls = 5
Total no.of balls = 12.
The probability of one ball that are none of is yellow are⤵
None of is yellow(Blue balls).
=》 Favourable items / Total no.of items.
=》7/12.
Two balls⤵
7C2
Probabilty =》 7C2 / 12C2
=》7/22.
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Hope you understood..✌
manish805177:
but answer is 7/22
Yes ,. 7/12 is wrong. The correct Answer is 7C2 /12C2 , i.e( 7*6)/(12*11)=7/22
I have only found to 1 ball and now I have found to 2 balls
No problem. Missing s are common while attempting this section of maths.
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