Abag contains 15 balls of which some are white and some are black the probability of drawing a black ball is 2 by 3 so find the number of white balls in the back

probability of black ball is 2/3 .

so number of black ball is given as = total ball × prob of black ball

= 15×2/3 = 5×2 = 10

so black balls are 10

so white balls are = 15 - 10 = 5

-13

step-by-step explanation:

f(x)=2x-5 for f(-4)

f(-4)   means let x=-4

f(-4) = 2(-4) -5

f(-4) =-8-5

      = -13

b.my answer is b.

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