Fill in the blanks.
At a gathering,
717 of the boys and
27 of the girls and
12 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 -
717=
1017Fraction of the girls who remained
= 1 -
27 =
57Fraction of the adults who remained
= 1 -
12 =
12The number of boys, girls and adults who remained is the same.
Make the numerators the same.
LCM of 10, 5 and 1 = 10
10 x 117 x 1 of the boys =
5 x 27 x 2 of the girls =
1 x 102 x 10 of the adults
1017 of the boys =
1014 of the girls =
1020 of the adults
Boys : Girls : Adults
17 : 14 : 20
(a)
Number of boys at first = 17 u
(b)
Number of girls at first = 14 u
(c)
Number of adults at first = 20 u
(d)
Number of people who remained
= 3 x 10 u
= 30 u
Answer(s): (a) 17; (b) 14; (c) 20; (d) 30