Which ratio is equivalent to 3/20
2 answers:
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Answer:
<h2>i) 3</h2><h2>ii) 5</h2>Step-by-step explanation:
Let H be the set of students who play Hokey
V be the set of students who play Volleyball
S be the set of students who play Soccer
======================================
card(volleyball only) = card(V) - [card(V∩H∩S) + card(V∩H only) + card(V∩S only)]
= 73 - [50 + (58-50) + (62-50)]
= 73 - [50 + 8 + 12]
= 73 - 70
= 3
………………………………………………
Card(Hokey only) = 100 - [3 + 8 + 50 + 10 + 12 + 12]
= 100 - 95
= 5
…………………
<u><em>Note</em></u> :
A Venn diagram might be helpful in such case.
<u>Answer</u>:
189 tickets were sold in amusement park on Saturday.
<u>Step-by-step explanation:</u>
Given:
The ratio of child and adult tickets = 8:1
sold 147 more child tickets than adult tickets
To Find:
Number of tickets sold on Saturday in the amusement park = ?
Solution:
Let
The number of child ticket be x
The number of adult ticket be y
Then from the ratio we know that there are 8 child ticket than adult ticket
=> x =8y------------------------------(1)
Also, they sold 147 more child tickets than adult tickets
=> x = 147 +y--------------------------(2)
Equating (1) and (2)
8y = 147 +y
8y-y = 147
7y=147
y =
y =21
So The number of adult tickets were 21
Now the child ticket
x = 147 +y
x = 147+21
x= 168
Total tickets = adult ticket + child ticket
=>21 +168
=> 189 tickets