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In a race, the mean time for three runners was 12.4 seconds and the mean time for another six runners was 11.5 seconds. Calculate the mean time for all the nine runners

In a race, the mean time for three runners was 12.4 seconds and the mean time for another six runners was 11.5 seconds. Calculate the mean time for all the nine runners
asked 153k views
2 votes
In a race, the mean time for three runners was 12.4 seconds and the mean

time for another six runners was 11.5 seconds. Calculate the mean time for
all the nine runners

asked
User Janeris
by
8.6k points

1 Answer

7 votes

Answer:

11.8

Explanation:

3(12.4) + 6(11.5) = 37.2 + 69 = 106.2

106.2/9 = 11.8

answered
User Jeff Levine
by
9.4k points
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