exam Maths Puzzle Numerical Ability

Can someone help me..please
FIND THE MEAN
3,7,10,11,14

IT HINK THE ANSWER IS 9?

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exam Other Question

My question is, if a bicyclist rode into the country for 5 h. Once returning, what was the speed if the person was traveling 5 mi/h faster and the trip took 4 h. What was the speed going each way? Ellie and Ruth make plans to paint the house. Ellie can paint it in 10 hours. Ruth says she can paint it in 6 hours. How long will it take them to paint the house together?