Skip to main content

Aptitude Day 160

Problems on Average:

1. A library has an average of 400 visitors on Sundays and 130 on other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is:

Solution:
                The month has 5 Sundays since it begins with a Sunday.

                Average = [ 400(5) + 130(25)] / 30
                                = 5250/30
                                = 75.

2. If the average marks of these 3 batches of 40, 50 and 65 students respectively is 60, 65 and 70, then the average mark of all students is:

Solution:
                 Average = [40(60)+50(65)+65(70)]/ [40+50+65]
                                 = [2400+3250+4550]/ 155
                                 = 10200/155
                                 = 65.8.


Comments

Post a Comment

Popular posts from this blog

Vocabulary Day 21

Stammer Thesaurus: Verb : stutter in speech, speak haltingly, speech defect           halt, hesitate, pause, stop, sputter... Antonyms : say quickly, pronounce, enunciate... Example sentences: ·          He was stammering when the teacher caught him red-handed. ·          One should avoid the stammering while delivering a speech. 
Post a Comment
Read more

Vocabulary Day 32

Indulge Thesaurus: Verb : allow            entertain, delight, give in, go along, please, pamper, satisfy... Antonyms : disappoint, distress ...         Example sentences: ·          You must indulge your child.  ·          One must not indulge in such activity.
Post a Comment
Read more