Question

A box contains 56 balls. The probability of selecting a red ball at random is 5/7. How many balls in the box are not red?

Answer 1

16 balls

Explanation:

If 5/7 of the balls are red then the fraction of balls that are not red is;

`(7)/(7) - (5)/(7) = (2)/(7)`

Which means 2/7 of the balls are not red. So to get the number;

`= (2)/(7) * 56 \\= 2 * 8\\`

= 16

∴16 balls are not red

Answer 2

Brain to me plz

Explanation:

2/7 is the balls are not red, so 2/7 multiplyed by 56

which is 16