urvashis09 wrote:

CounterSniper wrote:

Bunuel wrote:

A zoo sold admission tickets to groups of 30 people every 5 minutes from 9:00 in the morning to 5:55 in the afternoon, inclusive. What is the total number of tickets sold?

A) 3120

B) 3150

C) 3180

D) 3210

E) 3240

30 * (9 * 60/5) -30

30 * 108 -30

30 *107

3210

Corrected !!

Since 9 am in inclusive , 30 tickets are sold at 9 as well !!

so total = 3210 + 30

3240

Hi,

Can you please help understand what is meant by at 9 AM? The question states every 30 tickets are sold every five minutes "from" 9 AM. So how can it be AT 9 AM?

Hi,

The question says 9 am inclusive , we therefore have to take into account the number tickets sold at 9 am as well.

Assume the tickets started selling at

9:05 the next instance was at 9:10 followed by 9:15 .....10:00

total 12 such instances in an hour

now,

from 9 am to 6 pm we have 9 hours

total no of tickets sold = 12*9*30 =3240

but the last set of tickets were sold at 8:55

so the number of tickets sold till

8:55 is 3240-30 =3210 tickets.

coming back to the inclusive part of the question , 30 tickets were sold at 9 am

therefore

sum total = 3210+30=

3240.