Watermelon trouble!
Probability
Level
2
A large watermelon weighs 20 kg, with 98% of its weight being water. it is left to stand in the sun and some of the water evaporates so that now only 95% of its weight is water. What does it now weigh?
10
19
19.4
20
17
8
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Let x = water evaporated, so (,98*20 -x)/(20 -x) = .95, or .05x = .6, and x = 12.Therefore 20 - 12 = 8. Ed Gray