(a) Bimal secured 750 marks out of a total of 900. What percentage of marks did
(b) The price of a TV decreases from 19900 to 19000. Find the decrease per cent in the he secure? price of the TV.
(c) The number of students in a school increased from 800 to 860. What was the increase per cent in the number of students?
(d) In a school, out of a total of 1050 students, 210 are girls. What per cent of the students are boys?
please answer all the question
Answers
Step-by-step explanation:
(a) Marks secured by Bimal= 750
Total marks= 900
% of marks he secured= (marks secured by Bimal/total marks)×100 %
=[(750/900)×100]
=83.33%
(b) Old price of the TV= 19900
New or decreased price of the TV= 19000
The decreased % in the price of the TV=
(decrease in the price of the TV/old price of the TV) × 100
= [(19900-19000)/19900] ×100 %
= 4.523%
(c) The number of students in a school before increase= 800
the number of students in a school after increase= 860
increase %=[ {(860-800)/860}×100]%
=[(60/860)×100]%
=6.977%
(d) total students=1050
total girls =210
total boys=(1050-210)
=840
% of the students who are boys= (total boys/total students)×100%
=[(840/1050)×100]%
=80%