Question

in a picnic 40% were boys and 18 girls were there . picnic site is 40km from the school and the bus travel expenses is ₹12/km. the total cost of refreshments will be ₹ 8560
Calculate:
(a) The ratio of no. of girls to the
no. of boys in the class.
(b) The total cost / head if two teachers
are also going with the class.​

Answer 1

Answer:

(a)  3 : 2

Step-by-step explanation:

Percent of girls  =  100 - 40

                          =  60 %

Let the total number of students be x.

According to question,

Number of girls  =  60/100 * x

                   18    =   3x/5

                   3x    =   18 * 5

                   3x    =   90

                    x     =   90 / 3

                   x      =    30

Hence, the total number of students be 30.

Now,

Number of boys  =  Total number of students - number of girls

                            =   30 - 18

                            =   12

(a)  Ratio of number of girls to that of boys  =  18 : 12

                                                                        =   3 : 2