the number of boys in a second class is 7 more than the girls of girls total strength of class is 49 find the number of boys and the number of girls
answer and verify your answer
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the number of boys in a second class is 7 more than the girls of girls total strength of class is 49 find the number of boys and the number of girls
answer and verify your answer
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Step-by-step explanation:
Number of girls = y
Number of boys = 7 + y
Total class strength = 49
So,
[tex]y + 7 + y = 49 \\ 2y + 7 = 49 \\ 2y = 49 - 7 \\ 2y = 42 \\ y = 42 \div 2 \\ y = 21[/tex]
y = 21 girls
y + 7 = 28 boys
Number of girls = 21
Number of boys = 28
Verification
Number of girls + Number of boys = Total strength
21 + 28 = 49