Berikut ini adalah pertanyaan dari yossytheofilus pada mata pelajaran Matematika untuk jenjang Sekolah Menengah Atas
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data:
boys = 55%
⁷/10 can swim
240 girls cannot swim
can swim girls:boys = 5:9
question:
a) % girls cannot swim
b) boys cannot swim?
answer:
⁷/10 = 5+9 units
70% = 14 units
1 unit = 5%
girls = 100-55 = 45%
a) % girls cannot swim
= 45% - (5 units x 5%)
= 20% ✔️
b) 20% = 240
1% = 12 orang
boys cannot swim
= (55% - 9 x 5%) x 12
= 120 boys ✔️
_____________
55% of a group of children were boys. of the children were able to swim. 240 girls could not swim.
The ratio of the number of girls who could swim to the number of boys who could swim is 5:9.
What percentage of the children were girls who could not swim?
How many boys in the group could not swim?
___________
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Last Update: Thu, 20 Oct 22