Question

Felicia wanted to find the number of boys in the school band if 30% of the 50 students are boys. Is her answer correct? Explain why or why not. part whole = 30 × 2 100 × 2 = 60 200

Answer 1

Answer:

No, Felicia’s answer is not correct. She should have divided by 2, not multiplied. 30 divided by 2 is 15. So 15 of the 50 students in the band are boys.

Answer 2

Using the proportion principle, the number of boys in the band from a total of 50 is 15.

To obtain the number of boys in the band :

• Total number of students = 50
• Percentage of boys = 30%

The number of boys can be obtained thus :

• Percentage of boys × number of students

Number of boys = 30% × 50 = 15

Therefore, there are 15 boys in the band.

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