Fill in the blanks.
At a gathering,
79 of the boys and
45 of the girls and
1519 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 -
45 =
15Fraction of the adults who remained
= 1 -
1519 =
419The number of boys, girls and adults who remained is the same.
Make the numerators the same.
LCM of 2, 1 and 4 = 4
2 x 29 x 2 of the boys =
1 x 45 x 4 of the girls =
4 x 119 x 1 of the adults
418 of the boys =
420 of the girls =
419 of the adults
Boys : Girls : Adults
18 : 20 : 19
(a)
Number of boys at first = 18 u
(b)
Number of girls at first = 20 u
(c)
Number of adults at first = 19 u
(d)
Number of people who remained
= 3 x 4 u
= 12 u
Answer(s): (a) 18; (b) 20; (c) 19; (d) 12