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RD Sharma Solutions Class 8 Mathematics Solutions for Percentage Exercise 12.2 in Chapter 12 - Percentage
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A certain school has 300 students, 142 of whom are boys. It has 30 teachers, 12 ofwhom are men. What percent of the total number of students and teachers in theschool is female?
Answer:
The given details are,
In a school, number of students are = 300
Number of boys = 142
Number of girls = 300 – 142 = 158
In a school, number of teachers are = 30
Number of male teachers are = 12
Number of female teachers are = 30 – 12 = 18
Total number of students and teachers is = 300+30 = 330
Total numbers of female in the school is = 158+18 = 176
Percentage of female in the school = (176/330) × 100
= 160/3%
∴ Total of 160/3% are female in the school.
Video transcript
"hello students i am vita your math
leader tutor and
today's question is a certain school has
300
students 142 of whom are boys
it has 30 teachers 12 of whom are
man what percent or the total number of
students and teachers in the school is
female so in this question first of all
the total
students is equal to
total students is equal to 300
142 of whom are boys so the number of
female students number of
female students is equal to 300
minus 142
then we get
300 minus 142 10
minus 2 8 9 minus 4
5 and 2 minus 1 1 it is 1
58 affiliate students
and total teachers
total teachers is equal to 30
and number of female teachers
number of female teaches is equal to
30 minus 12 so
it becomes 18 now the total number of
total number of
females
are 158 plus
18 so it becomes 176
and the total number of the students and
total number of
total number of
students and teachers
students and
teachers is equal to
300 plus 30
is equal to 330.
now we have to find the percentage of
females is equal to
number of female to the number of
females
170 6
176 divided by total number of
students and teachers are 330 into
100 cancel out each other eleven threes
are
eleven and eleven six so it becomes
one sixty by 3
percent so this is our answer i hope
you like this video so please subscribe
for more updates and do comment your
questions thank you"
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