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The answer to your question is letter b) 21

Step-by-step explanation:

Question: f(g(-1)) = ?

F(x) = 2x -3           g(x) = x2 + 11

f(g(x)) = 2(x2 + 11) -3             simplify

f(g(x) = 2x2 +22 - 3 = 2x2 +19    first result

f(g(-1)) = 2(-1)2 + 19      substitution

           = 2(1)  + 19       simplify

           = 2 + 19

            = 21                last result

use this formula:

p(a\b) = p(a and b)/p(b).

take it from here.

answer:   35 % is the probability of a late departure or an early arrival.

step-by-step explanation:

let l represents the late departure and e represents the early departure.

then, according to the question,

p(l) = 12 %,   p(e) = 27 % and = 4 %

and, we have to find out,

but, we know that,

which is the required equation that will use to find the probability of a late departure or an early departure.

therefore,   the probability of a late departure or an early arrival =   35 %