15. If 1/4 is subtracted from a number and the difference is multiplied by 8, the result is 24. Find the number.
16. In a class of 56 students, the number of girls is 3/5 the of the boys. Find the number of boys in the class.
Share
15. If 1/4 is subtracted from a number and the difference is multiplied by 8, the result is 24. Find the number.
16. In a class of 56 students, the number of girls is 3/5 the of the boys. Find the number of boys in the class.
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Answer:
let the no of boy be x
girls are = 3/5 × x
56 = 3/5x + x
56= 8x/5
x = 56 × 5 ÷8
x = 35
no of boys = 35
no of girls = 3/5 ×35
= 21
Step-by-step explanation:
15) let the number be X and the result of subtraction be Y.
so according to question,
X- 1/4=Y. equation 1
and, Y*8=24
or, Y=3. equation 2
put equation 2 in equation 1
we get , X-1/4=3
4X- 1=12
4X =13
X= 13/4
the number be 13/4.
16) let the number of boys be X then the number of girls be 3X/5.
according to question,
X+3X/5=56
5X+3X=280
8X=280
X=35.
so so the number of boys be 35 and the number of girls be 21.