A regular human hand contains 27 different bones. there are 206 bones altogether in the human body approximately what percent of
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The function
... f(x) = (x+2)/(x-1) = 1 + 3/(x-1)
is symmetrical about the line y=x, hence is its own inverse.
We can evaluate the desired derivative directly.
... f'(x) -3/(x-1)²
so f'(2) is
... f'(2) = -3/(2-1)²
The probability of picking a black ball first is 
, because there are 4 black balls and 1 white ball which is 5 balls in total. After picking the first ball, 4 balls remain - 3 black and 1 white, so the probability of picking a white ball is 
.
So, the probability of picking a black ball first followed by a white ball is
So, the probability of picking a black ball first followed by a white ball is