Question

There are same number of packets of sweets and biscuits. There are 5 sweets

in a packet. There are 3 biscuits in a packet. Faizal counted 120 sweets and
biscuits altogether. How many packets of biscuits are there?
Y.

Answer 1

There are 45 packets of biscuits

Explanation:

Ratio Actual

5 Sweets

3 Biscuits

8 120 Total

Make a proportion:

`(Bicuit)/(total)` =
`(biscuits)/(total)` ratio on the left and actual on the right

`(3)/(8)` =
`(x)/(120)` x equals the unknown actual biscuit count.

8 x 15 =120, so solve for x by multiplying 3 by 15

x = 45

Answer 2

15

Explanation:

equation=

`5x+3x=120\\equals..\\8x=120\\x= 15`

There are 15 packets each of both sweets and biscuits.

Check!

`5(15)=75` sweets

`3(15)=45` biscuits

`75+45=120` sweets and biscuits altogether

Hence, there are 15 packets of biscuits.