Fill in the blanks.
At a gathering,
15 of the boys and
12 of the girls and
15 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 -
15=
45Fraction of the girls who remained
= 1 -
12 =
12Fraction of the adults who remained
= 1 -
15 =
45The number of boys, girls and adults who remained is the same.
Make the numerators the same.
LCM of 4, 1 and 4 = 4
4 x 15 x 1 of the boys =
1 x 42 x 4 of the girls =
4 x 15 x 1 of the adults
45 of the boys =
48 of the girls =
45 of the adults
Boys : Girls : Adults
5 : 8 : 5
(a)
Number of boys at first = 5 u
(b)
Number of girls at first = 8 u
(c)
Number of adults at first = 5 u
(d)
Number of people who remained
= 3 x 4 u
= 12 u
Answer(s): (a) 5; (b) 8; (c) 5; (d) 12