a box contains 12 balls of which x are black if one ball is drawn at random from box what is the prob that it will be a black ball
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Total no. 12
Getting a black ball x/12
6more black ball 12+6= 18
no.of black ball x+6
Please(getting a black ball)=x+6/18
P2=2p1
x+6/18=2×x/12
X+6/18=x/6
6(x+6)=18
6x+36x=18x
12x=36
X=36/12
X=3
Getting a black ball x/12
6more black ball 12+6= 18
no.of black ball x+6
Please(getting a black ball)=x+6/18
P2=2p1
x+6/18=2×x/12
X+6/18=x/6
6(x+6)=18
6x+36x=18x
12x=36
X=36/12
X=3
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