GCSE Secondary Maths Age 13-17 - Probability & Statistics: Mean - Explained

The video tutorial explains how to solve a problem involving calculating the mean number of sweets in packets and boxes within a carton. It begins by setting up the problem, detailing the number of packets and boxes, and the total mean of sweets. The tutorial then walks through the calculations needed to find the total number of sweets, the mean for the packets, and finally the mean for the boxes. It also discusses the mark allocation for the problem and highlights common student difficulties, emphasizing the importance of understanding the problem setup and using visualization techniques to aid comprehension.

What is the first step in solving the problem of finding the mean number of sweets in the boxes?

• Find the mean number of sweets in the packets.

• Subtract the number of packets from the total.

• Determine the number of boxes in the carton.

• Calculate the total number of sweets in the carton.

How do you calculate the total number of sweets in the carton?

• Multiply the total number of packets by the mean number of sweets per packet.

• Add the number of packets and boxes together.

• Subtract the number of sweets in the packets from the total.

• Multiply the number of boxes by the mean number of sweets in the boxes.

What is the mean number of sweets in the boxes?

• 18

• 20

• 10

• 14

How many marks are allocated for correctly subtracting the number of sweets in the packets from the total?

• One mark

• No marks

• Two marks

• Three marks

What strategy is suggested for tackling wordy questions?

• Focus only on the numbers.

• Ignore unnecessary details.

• Visualize the problem and draw a diagram.

• Memorize the information.