Question

a bag consist a bag consists 4 red balls 3blue and 9green balls how many green what should be removed the difference between green ball probability and drawing a redball is 1/12​

Answer 1

Answer:

MATHS

A bag contains 6 white and 4 red balls. Three balls are drawn at random. What is the probability that one ball is red and the other two are white ?

A .

21

B .

121

C .

103

D .

127

December 20, 2019Najiya Kumari

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ANSWER

Given a bag contains 6 white and 4 red balls.

∴ The sample space is S=6+4=10

One ball is red and two balls are white.

CaseI: If red ball is drawn at first position and then the white balls

P=106×94×83=10×9×86×4×3=101

CaseII: If red ball is drawn at second position and then the white balls correspondingly

P=104×96×83=10×9×84×6×3=101

CaseIII: If red ball is drawn at third position 

P=104