smc-1105-40-Ratio (2 part)

Measurement, STD1 M5 2023 HSC 9 MC

A bag contains 150 jelly beans. Some of them are red and the rest are blue. The ratio of red to blue jelly beans is 2 : 3.

Sophie eats 10 of each colour.

What is the new ratio of red to blue jelly beans?

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$C$

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$\text{Original ratio}\ = 2:3$

$\text{5 parts = 150}\ \Rightarrow\ \text{1 part}\ = 150/5=30$

$\text{Original ratio (by number)}\ = 2 \times 30:3 \times 30 = 60:90$

$\text{After eating 10 of each colour:}$

$\text{Ratio}\ = 50:80 = 5:8$

$\Rightarrow C$

♦♦ Mean mark 34%.

In a raffle, the total prize money is shared among the first two tickets drawn in the ratio 6 : 4.

The prize for the second ticket drawn is $360.

What is the total prize money? (2 marks)

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`$900`

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`4/10 xx text(Total prize money = $360)`

`=> 1/10 xx text(Total prize money = $90)`

`:.\ text(Total prize money)`	`= 90 xx 10`
	`= $900`

There are 8 male chimpanzees in a community of 24 chimpanzees.

What is the ratio of males to females in the community?

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`=>\ text(B)`

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`=>\ text(B)`