Question

out of total of 600 students in a school 45% are boys if 20% of the boys are 30% of the girls in the school wear spectacles then what percentage of the total students wear spectacles​

Answer 1

600*45/100= 270

270*20/100=54 of boys

600-270=330 girls

330*30/100=99 of girls

54+99=153 total

Answer 2

Answer:

25.5%

Step-by-step explanation:

Boys = 600*(45/100)

=270

Girls = 600-270

=330

therefore, wear spectacles

= (20% of 270) + (30% of 330)

= {(20/100)*270} + {(30/100)*330}

= 54+99

= 153

therefore, required percentage

= {(153/600)*100}%

= 25.5%