Sunday, September 25, 2011

P5 whole numbers


My solution:

23 x $7 = $161
  4 x $5 = $20
$161 + $20 = $181
$5430 / $181 = 30 --> no. of groups of 27   (23+4)
(a)  30 x 23 = 690

(b)  $2 x 4 x 30 = $240

Note: In this case, there is no real penalty where the delivery company had to pay back for late delivery.  For some other cases where penalty means paying back the client, the solution is very different.  Recall the case of the kind of quiz where marks are deducted when a question is answered wrongly.  Do sound me out if you are still not clear.