Question

out of 1800 students in a school, 40%are girls and the rest are boys. If 25%of the boys and 45% of the girls are vegetarians then what percent of the total number of students are vegetarians.​

Answer 1

Answer:

vegetarians = 19.5%

Step-by-step explanation:

Given that

total number of students = 1800

40% are girls => (40/100)1800

=> girls = 720

girls = 720

we know that girls + boys = 1800

=> boys = 1800 - 720

=> boys = 1080

boys = 1080

and also given that

25% of boys and 45% of girls are vegetarians

=> vegetarians = ( 25/100 )1080 + ( 45/100)720

= 27 + 9*36

= 27 + 324

= 351

Number of Vegetarians = 351

vegetarians% = ( 351/1800 )100

= 19.5%

therefore, vegetarians% = 19.5%

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Answer 2

Step-by-step explanation:

total number of girls=40/100×1800

=720

total number of boys =1800-720

=1080

number of vegetarian girl= 45/100×720

=4.5×72

=324

number of vegetarian boys=25/100×1080

=2.5×108

=270

total number of vegetarians =270+324

=594