Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter

    18 packets of sweets and 12 boxes of sweets in a carton
    mean number of sweets in all 30 packets and boxes is 14
    mean number of sweets in the 18 packets is 10

    work out the mean number of sweets in the boxes


    To work out the mean, you have to do the total / the number of 'things' you have, in this case the packets or boxes, so in this question we have to work backwards and multiply the mean with the number of packets/boxes.

    Here's my answer (hope it's right!):
    total number of sweets = 30 x 14 = 420
    number of sweets in packets = 18 x 10 = 180
    therefore, the number of sweet in boxes = 420 - 180 = 240
    so the mean of the sweets in boxes = 240 / 12 = 20
Do you agree with the PM's proposal to cut tuition fees for some courses?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.