Chemistry Biology
Physics
Total
Male
12
14
16
42
Female
16
20
12
48
Total
28
34
28
90
a) How many people are male OR study Biology OR both?
b)
What is the probability that any person is male OR
studies Biology OR both?

1. 22

2. 1

3. 7

4. 18

step-by-step explanation

e2020 got it right

step-by-step explanation: given equation a = h(b 1+b 2)

also we are given values of a, h and b 1 as :

a = 16, h = 4, and b 1 = 3.

in order to solve it for b 2, we need to plug the given values of   a, h and b 1 .

therefore, plugging values of   a, h and b 1   in given equation, we get

16 = 4( 3 + b 2)

first dividing both sides by 4, we get

4 = 3 + b 2

subtracting 3 from both sides, we get

4 -3 = 3 -3 + b 2

1 = b 2.

27 +27 or 27times 2=54

the diffrence is 0

6

step-by-step explanation: