0 votes 0 votes consider a collection of 20 balls,where each ball has unique number printed on it from 1-20.if we take out 8 balls from this collection at random,then the expected value of sum of numbers printed on these 8 balls is ______?? Gate Fever asked Jan 2, 2019 Gate Fever 449 views answer comment Share Follow See all 6 Comments See all 6 6 Comments reply Show 3 previous comments Magma commented Jan 2, 2019 reply Follow Share Dunno but i want to know the approach as range of sum = 36 <= sum < = 132 than what's the approach you follow ?? 0 votes 0 votes Magma commented Jan 2, 2019 reply Follow Share https://math.stackexchange.com/questions/1712491/expected-value-of-sum-of-distinct-random-integers 1 votes 1 votes Gate Fever commented Jan 3, 2019 reply Follow Share @Abhisek Tiwari 4 so (132+36)/2=34 its a typo,must be 84 yup,84 is correct answer!! 0 votes 0 votes Please log in or register to add a comment.