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# Maths: Finding the mean

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1. There are a packet of sweets and 12 boxes of sweets in a carton.
The mean number of sweets in all the 30 packets and boxes is 14.
The mean number of sweets in 18 packets is 10.
Work out the mean number of sweets in the boxes.

Also if you happen to now how to answer the following questions it would be very helpful:
Attachment 523443523445
Attached Images

2. To do q14 in the attachment do:

360/5=72 to work out the exterior angle for the pentagon
180-72= 108 to find the interior angle of the pentagon.

360/8=45 to work out the exterior angle for the octagon180-45= 135 to find the interior angle of the octagon.

135-108= 27 to work out angle FEQ.

FEQ = QFE
FEQ+QFE= 27 +27 = 54
180-54 = 126 to work out x

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Updated: April 17, 2016
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