Basil asks each of 40 students how many books they bought last year.
The chart shows information about the number of books they each bought.
144
a) What is the percentage
12
of these students who
bought 20 or more books? (2)
10-
15%
Number
of
b) Work out an estimate for the
students
mean number of books bought.
8
6
4
2
0
0 to 4
5 to 9 10 to 14 15 to 19 20 to 24
Number of books
(4)
Total marks: 6

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

answer:

f(5/2) = 10/3

i hope this you!

a

step-by-step explanation:

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 %