Expectation

Jun 9, 2018 at 5:37am
closed account 3UohqMoL (121)
Hi I need just 1 hint about the explanation in the given test.Can anyone explain me with what number do we multiply the probabily to find expectation in the example given below.

https://www.codechef.com/JUNE18B/problems/BUILDIT
Jun 9, 2018 at 11:33am
closed account 3UohqMoL (121)
Hey please someone help me here
Jun 11, 2018 at 1:41am
closed account 3UohqMoL (121)
Hello anyone done with this
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