MBA Exam

a1,a2,a3,a4......a24 are in arithmetic progression and a1+a5+a10+a20+a24=225, then sum of series a1+a2+a3....+a24 is

1) 909
2) 75
3) 750
4) 900

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MBA Other Question

it takes the pendulum of a clock 7 seconds to strike 4 o'clock. how much time will it take to strike 11 o'clock?aproach please??!

1) 18 seconds
2) 20 seconds
3) 19.25 seconds
4) 23.33 seconds
A boat travels 60 km upstream and 100 km downstream in 8 hours and then travels 75 km upstream and 175 km downstream in 12 hours. What is the speed of the boat in still water?

1) 36 km/hr
2) 30 km/hr
3) 24 km/hr
4) 20 km/hr