Fill in the blanks.
At a gathering,
79 of the boys and
711 of the girls and
1115 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 -
79=
29Fraction of the girls who remained
= 1 -
711 =
411Fraction of the adults who remained
= 1 -
1115 =
415The number of boys, girls and adults who remained is the same.
Make the numerators the same.
LCM of 2, 4 and 4 = 4
2 x 29 x 2 of the boys =
4 x 111 x 1 of the girls =
4 x 115 x 1 of the adults
418 of the boys =
411 of the girls =
415 of the adults
Boys : Girls : Adults
18 : 11 : 15
(a)
Number of boys at first = 18 u
(b)
Number of girls at first = 11 u
(c)
Number of adults at first = 15 u
(d)
Number of people who remained
= 3 x 4 u
= 12 u
Answer(s): (a) 18; (b) 11; (c) 15; (d) 12