Fill in the blanks.
At a gathering,
911 of the boys and
910 of the girls and
35 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 -
911=
211Fraction of the girls who remained
= 1 -
910 =
110Fraction of the adults who remained
= 1 -
35 =
25The 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 111 x 1 of the boys =
1 x 210 x 2 of the girls =
2 x 15 x 1 of the adults
211 of the boys =
220 of the girls =
25 of the adults
Boys : Girls : Adults
11 : 20 : 5
(a)
Number of boys at first = 11 u
(b)
Number of girls at first = 20 u
(c)
Number of adults at first = 5 u
(d)
Number of people who remained
= 3 x 2 u
= 6 u
Answer(s): (a) 11; (b) 20; (c) 5; (d) 6