P(A) = 0.72 P(B) = 0.28
P(A and B) = 0.14

a) P(A or B)
b) P(A^c)
c) P(B^c)
d) P(A^c and B^c) or P(neither A not B)
e) P(A or B^c)
f) P(A^c or B)

^c meaning the complement of

i) or

- union, U

- addition, +

ii) and

- intersection, (upside down U)

- multiplication, x

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls

hello from mrbilldoesmath!

answer:   x^2 + y^2 = 1024

discussion:

the equation of a circle with center (h,k) and radius "r" is

(x-h)^2 + (y-k)^2 = r^2.

in our case

(x-0)^2 + (y-0) ^2 = 32^2 = 1024

you,

mrb