math

HHow many pupils are there in a class if two pupils remain after four rows of seats are filled, and nine pupils remain after three rows of seats are filled?

a. 21
b. 22
c. 28
d. 30
e. 32

please answer and explain

  1. 👍 0
  2. 👎 0
  3. 👁 205
  1. If there are 9 left over from 3 rows and 2 left over from 4 rows, each row must seat 9-2 = 7 pupils

    So, 7*4 +2 = ?

    Or, 7*3 +9 = ?

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Math

    If 30% of pupils in a school are boys,what percentage of the pupils are girls

  2. Math

    A group of teachers and pupils attended a concert. The teachers paid $1200 altogether and the pupils paid $640 altogether for their tickets. The price of an adult ticket was $60 and there were 4 more female teachers than male

  3. Maths

    In class 8m, there are 27 pupils. There are twice as many boys as girls. How many boys are there?

  4. Maths

    In a group of 120 pupils, 80 can play guitar only and 25 can play piano only. How many pupils can play both instruments if there are 3 pupils who can play neither?

  1. Maths

    A school has 1800 pupils. 55% of the pupils are girls. 30% of the girls and 70% pf the boys travel by bus. a.) How many girls travel by bus? b.) How many boys travel by bus? c.) What percentage of the pupils travel by bus?

  2. Maths

    If 30% of pupils in a class are boys how many percent pupils are girls

  3. math

    In a class, 3/4 of the pupils wore spectacles.1/3 of the pupils who did not wear spectacles were boys.What fraction of all the pupils were boys who did not wear spectacles?

  4. what percentage of pupils are absent?

    If 24 out of 30 pupils in class are present, what percentage of pupils are absent?

  1. maths

    54% of the pupils in a class are girls. what % of pupils are boys? if the number of boys are 23. find the strength of the class.

  2. Maths

    In a class of 39 pupils, 1/4 of the girls wear spectacles and 2/3 of the boys wear spectacles. A total of 16 pupils in the class wear spectacles. How many girls do not wear spectacles? Answer preferably in model method please.

  3. Maths

    Class A has 8 pupils and class B has 13 pupils. Both classes sit the same maths test. The mean score for class A is 38. The mean score for class B is 53. What is the mean score (rounded to 2 DP) in the maths test across both

  4. mathematics

    If 24 out of 30 pupils in a class are present, what percentage of the pupils are present

You can view more similar questions or ask a new question.