Posted by **D** on Tuesday, September 13, 2011 at 7:33pm.

Ms. Poole, my PE teacher, asked the 100 seventh in my school if they could swim. Half the boys and two thirds of the girls said yes. Seventeen boys said no. How many seventh graders know how to swim?

- Math -
**Ms. Sue**, Tuesday, September 13, 2011 at 7:38pm
17 boys do not know how to swim. Therefore, 17 boys do swim.

100 - 34 = 66 girls

2/3 * 66 = 132/3 = 44

44 + 17 = ?

- Math -
**Daniel**, Tuesday, September 13, 2011 at 7:42pm
Easy. Ok

"Half the boys said....yes" which means half said no. 17 said no so that means 17 out of 34 boys know to swim. Now for the girls, we know there are 34 boys so that leaves 66 girls total. 66 multiplied by 2/3 is 44. (44 girls said yes.) 44+34= 78.

Therefore 78 seventh graders know how to swim

- Math -
**Daniel**, Tuesday, September 13, 2011 at 7:44pm
(actually sorry, it's 17+44, I made a mistake. That is equal to 61)

- Math -
**?**, Monday, October 28, 2013 at 11:49pm
Half the boys said yes so half said yes. 17 boys said no so the other half said yes so 17 boys said yes. 17 + 17 = 34 boys total. Now 100 students take away 34 boys (students) which now leaves 66 students (girls) total.

now 2/3 of 66 is 44 because 22 times 3 = 66. so Now 44 girls said yes and 17 boys said yes so 44 + 17 = 61 seventh graders know how to swim.

## Answer This Question

## Related Questions

- math - my P.E. teacher asked the 100 seventh graders in my school if they could ...
- algebra - There are 384 seventh graders at MArk's school. If there are 48 more ...
- Math - A math class has girls and boys in the seventh grade and girls and boys ...
- Math - If the ratio of girls to boys on the swim team is 2:3, which of these ...
- Math - Mrs.Smith's class has 12 girls and 8 boys. What percent of he class are ...
- math - There are 12 girls in one of the fifth grade classes. The number of girls...
- math - the current ratio of boys to girls at a certain school is 2 to 5 . if 12 ...
- statistics - A school adjustment inventory is administered to boys and girls of ...
- Math - For every girl taking classes at the martial arts school, there are 3 ...
- MATHS - Two different schools (A and B) have the same number of pupils. The ...

More Related Questions