Fill in the blanks.
At a gathering,
1315 of the boys and
45 of the girls and
57 of the adults left after 1 hour.
The number of boys, girls, and adults who remained were the same.
- Number of boys at first = _____ u
- Number of girls at first = _____ u
- Number of adults at first = _____ u
- Number of people who remained = _____ u
(a)
Change fraction into units.
Fraction of the boys who remained
= 1 -
1315=
215Fraction of the girls who remained
= 1 -
45 =
15Fraction of the adults who remained
= 1 -
57 =
27The number of boys, girls and adults who remained is the same.
Make the numerators the same.
LCM of 2, 1 and 2 = 2
2 x 115 x 1 of the boys =
1 x 25 x 2 of the girls =
2 x 17 x 1 of the adults
215 of the boys =
210 of the girls =
27 of the adults
Boys : Girls : Adults
15 : 10 : 7
(a)
Number of boys at first = 15 u
(b)
Number of girls at first = 10 u
(c)
Number of adults at first = 7 u
(d)
Number of people who remained
= 3 x 2 u
= 6 u
Answer(s): (a) 15; (b) 10; (c) 7; (d) 6