paidlukkhha wrote:

The organizers of a conference offered a certain number of simultaneous seminars with the intention that each seminar would be attended by 18 conference attendees. However, space limitations allowed only up to 15 conference attendees to participate in each of a number of the seminars, leaving 4 remaining seminars that together would be attended by at least 93 conference attendees. How many seminars were there?

10

11

15

20

26

Number of attendees per Seminar as per original plan = 18

Due to space limitations, max number of attendees = 15

Also, there are 4 seminars without any seating constraints and have total attendees of at least = 93

As per original plan, these 4 seminars would have had = 18*4 = 72

So , there are 21 extra attendees in these 4 seminars without space limitations

Therefore, number of seminars with seating limitation = (93-72)/3 = 7

Total number of seminars = 4+7 =11

Answer B

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