Total people in the cafeteria = 7 + 48 + 45 = 100
There are 45 boys.
The probability would be the number of boys over the total number of people:
45/100, which simplifies to 9/20
The answer would be A because A squared + B squared = C squared which is the hypotenuse.
Let three consecutive multiples of 7 be 7x,7x+7 and 7x+14
