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Sum of first n natural number =
Sum of first 10 natural numbers = = = = 55
Average of first 10 natural numbers = = 5.5
Sum of first 10 prime numbers = 2 + 3 + 5 + 7 + 11 + 13 + 17 + 19 + 23 + 29 = 129
Average of first 10 prime numbers = = 12.9
Required Difference = 12.9 – 5.5 = 7.4
The given ratios of milk and water are 6:1, 5:2 and 3:1 respectively.
Now, the ratio of milk and water when they mixed
So, the required ratio of water and milk is 19:65.
In each step, all the elements are moving in below sequence alternately.
According to the above sequence, the next figure will be –
Option A is correct.
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