Find the average number of Cello water bottles sold by shop A, D and E.
Percentage of total number of water bottles sold by shop B and C = [100 – (20 + 30 + 25)]% = 25% => 25% ----- 250 => 100% ------ 1000 Total number of water bottles sold by all the shops together = 1000 Number of water bottles sold by shop D = 30% of 1000 = 300 Let number of Milton water bottles sold by shop D be x. Number of Cello water bottles sold by shop D = x/4 According to the question, => x + x/4 = 300 => 5x = 1200 => x = 240 Milton water bottles sold by shop D = 240 Cello water bottles sold by shop D = 240/4 = 60 Similarly, 
Required average = (40 + 60 + 50)/3 = 150/3 = 50
Select the number from among the given options that can replace the question mark (?) in the following series.
8, 27, 64, 125, 216, ?
8, 7, 12, 35, 128, 635
7 29 ? 129 211 349
1 1 8 4 27 9 ?
...5 14 56 220 1125 6786
...40 30 20 ? 7.5 4.375
219 365 511 ? 803 949
...1930 1805 1589 1246 734 ?
...1001, 728, 513, 342, 217, ?
36, 49, 23, 62, ?, 75
