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Here are the times, in seconds, spent by some pupils to answer a question on DFM.       7       5       4       1       2Find the mean time.Give your answer correct to 1 decimal place where appropriate.

Question

Here are the times, in seconds, spent by some pupils to answer a question on DFM.       7       5       4       1       2Find the mean time.Give your answer correct to 1 decimal place where appropriate.

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Solution 1

To find the mean time, you need to add up all the times and then divide by the number of times.

Step 1: Add up all the times: 7 + 5 + 4 + 1 + 2 = 19 seconds

Step 2: Count the number of times: There are 5 times in total.

Step 3: Divide the total time by the number of times: 19 ÷ 5 = 3.8 seconds

So, the mean time is 3.8 seconds.

Solution 2

To find the mean time, you need to add up all the times and then divide by the number of times.

Step 1: Add up all the times: 7 + 5 + 4 + 1 + 2 = 19 seconds

Step 2: Count the number of times: There are 5 times in total.

Step 3: Divide the total time by the number of times: 19 ÷ 5 = 3.8 seconds

So, the mean time is 3.8 seconds.

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