Fill in the blanks.
At a gathering,
1219 of the boys and
12 of the girls and
815 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 -
1219=
719Fraction of the girls who remained
= 1 -
12 =
12Fraction of the adults who remained
= 1 -
815 =
715The number of boys, girls and adults who remained is the same.
Make the numerators the same.
LCM of 7, 1 and 7 = 7
7 x 119 x 1 of the boys =
1 x 72 x 7 of the girls =
7 x 115 x 1 of the adults
719 of the boys =
714 of the girls =
715 of the adults
Boys : Girls : Adults
19 : 14 : 15
(a)
Number of boys at first = 19 u
(b)
Number of girls at first = 14 u
(c)
Number of adults at first = 15 u
(d)
Number of people who remained
= 3 x 7 u
= 21 u
Answer(s): (a) 19; (b) 14; (c) 15; (d) 21