Question

There are 15 teachers is Science group of a school, 4 of them teach Maths only and 3 of them teach both Maths and Science. Find the number of teachers who teach Science only​

Answer 1

Answer:

12

Step-by-step explanation:

There are 15 teachers is Science group of a school

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Teachers who teach science

+

Teachers who teach science & maths

= 15

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Given ,

teacher who teach science + math = 3

Therefore ,

No of teachers who teach science only =

$15 \: - \: 3 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ = 12 \: teachers \: who \: teach \: science \: only$