Questions LLC
Login
or
Sign Up
Ask a New Question
Questions
Mathematics
A class contains 10 girls and 20 boys. The average height of the girls is 1.58m and the average height of the boys is 1.67m . Calculate the average height of the student in the class.
2 answers
Average height of the students in the class = (10 x 1.58 + 20 x 1.67) / (10 + 20) = 1.63m
I got 1.64 using the numbers given
You can
ask a new question
or
answer this question
.
Related Questions
there are 5 more girls than boys in a class. if 2 boys join the class, the ratio of girls to boys is 5:4. find the number of
In a class of boys and girls the mean weight of 8 boys is 55kg and the mean weight of a group of girls os 48kg the mean weight
In a certain class there are 12 boys and 18 girls. If the class average for an algebra exam is 90 and the boys' average score is
The ratio of boys to girls in a class room was 9:8. Half of the girls left the classroom, and then there were 15 more boys than
The mean height of 45 students is 152cm. If the mean height of girls alone is 144cm and that of boys alone is 168cm. Find the
If the ratio of girls to boys on the track team is 5 to 6 which of these shows possible numbers of girls to boys on the track
There were 40 more girls than boys in the school hall. 2/5 of the girls and 1/3 of the boys left the hall. In the end, there
There were 352 children at a concert.
After 2/5 of the girls and 1/2 of the boys left, there remained equal amounts of boys and
A class consists of 55% boys and 45% girls. It is observed that 25% of the class are boys and scored an A on the test, and 35%
In a school, the ratio of boys is to girls is 9:4. If there are presently 720 girls students, how many more girls would it take