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3 years ago

in a school the ratio of boys to girls 6/5. what is the probability of choosing a girl from a class of 22?

Mathematics

1 answer:

kifflom [539]3 years ago

8 0

the ratio 6/5 means for every 6 boys there are 5 girls.

Add the ratio: 6+5 = 11

Divide class total by 11: 22/11 = 2

Multiply each ratio number by 2 to find the number of boys and the number of girls:

6 x 2 = 12 boys

5 x 2 = 10 girls.

10 out of the 22 kids are girls.

The probability of picking a girl would be 10/22, which reduces to 5/11

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