6 blue slabs have a mean weight of 7kg 3 yellow slabs
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Answer:
6.6 kg
Step-by-step explanation:
6 blue slabs have a mean weight of 7 kg. The total weight of the 6 blue slabs will be:
= 6×7kg
= 42 kg.
3 yellow slabs have a mean weight of 5 kg. The total weight of 3 yellow slabs will be:
= 3×5kg
= 15kg.
1 grey slab have a mean weight of 9 kg.
To get the mean of 10 slabs, we add their total weights together and divide by 10. This will be:
(42 kg + 15 kg + 9 kg)/10
(66 kg)/10
6.6 kg.
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