The two-way table shows information about the subjects studied by some people. 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?

let soccer = x and golf = y

part a

1st equation: x + y = 125

2nd equation: x = y +45

part b

replace x in the 1st equation with the 2nd one:

y + 45 + y = 125

simplify:

2y + 45 = 125

subtract 45 from each side:

2y = 80

divide both sides by 2:

y = 80/2

y = 40

she plays golf for 40 minutes.

part c

no because she plays soccer for 45 minutes longer than golf 40 +45 =   85 minutes, not 80 minutes.

c

step-by-step explanation: easy math