ARITHMATIC MATHS CRASH COURSE FOR FREE AVERAGE (PART-6)

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Average The result obtained by adding several quantities together and then dividing this total by the number of quantities is called Average. The main term of average is equal distribution of a value among all which may distribute persons or things. Average (Sum of observations / Number of observations) Find the Average Speed If a person travels a distance at a speed of x km/hr and the same distance at a speed of y km/hr then the average speed during the whole journey is given 2xy x+y by-

If a person covers A km at x km/hr and B km at y km/hr and C km at z km/hr, thern the average speed in covering the whole distance is- A BC A B C

A man bought 13 articles at Rs. 70 each, 15 at Rs. 60 each and 12 at Rs.65 each. The average price per article is a) 60.25 b) 64.75 c) 65.75 d)62.25

/o Mo 2590 Mo Activ = c475

The average of marks scored by the students of a class is 68. The average of marks of the girls in the class is 80 and that of boys is 60. What is the percentage of boys in the class? a) 40% b) 60% c) 65% d) 70%

12. 49.:3

A fruit seller sold big, mediam and small side apples for Rs. 15, Rs.10 and Rs. 5 respectively. The total number of apples sold were in the ratio 3:2:5 Find the average cost of the apples. a) 8 b) 9 SSC LDC-2012] d) 10

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Three Science classes A, B and C take a Life Science test. The average score of class A is 83. The average score of class B is 76. The average score of class C is 85. The average score of class A and B is 79 and average score of class B and C is 81. Then the average score of classes A, B and C is A) 80 B) 81 C) 80.5 D) 81.5 [CGL MAINS 2015]

Avg 72 12 170

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The average weight of 12 crewmen in a boat is increased by 1/3 kg, when one of the crewmen whose weight is 55 kg is replaced by a new man. What is the weight of that new man? a) 58 b) 60 c) 59 d) 57 [SSC LDC 2012]

Out of 10 teachers of a school, one teacher retires in place of him a new teacher 25 yrs. Old joins. As a result of it average age of the teachers reduces by 3 yrs. Age of the retired teacher is a) 55 kg b) 65 kg c) 45 kg d) 75 kg [SSC LDC 2015]

The average of 8 men is increased by 2 years when two of them whose age are 21 and 23 years replaced by two new men. The average age of the two new men is a) 22 yrs b) 24 yrs c) 28 yrs d) 30 yrs

Totel ag rus hun @ttJ t 16 6o

The average age of 30 boys in a class is 15 years. One boy, aged 20 years left the class but two new boys came in his place whose age differ by 5 years. If the average age of all boys now in the class becomes 15 years, the age of the younger newcomer is a) 20 b) 15 c) 10 d) 8

=35

The average weight of 12 parcels is 1.8 kg. Addition of another new parcel reduces the average weight by 50 g. What is the weight of the new parcel? a) 1.5 kg b) 1.2 kg c) 1.15 kg d) 1.01 kg

There are 50 students in a class. One of them weighting 50 kg goes away and a new student joins. By this the average weight of the class increases by 1/2 kg. The weight of the new students is a) 70 kg b) 72 kg c) 76 kg d) 75 kg

The average age of 11 platers of a cricket team is increased by 2 months when two of them aged 18 years and 20 years are replaced by two new players. The average age of the new player is a) 19 year 1 month b) 19 year 6 month c) 19 year 11 month d) 19 year 5 month.

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3h 19m

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Abhilash Kumar

Online Educator Cleared SSC CGL, RRB & UGC NET.
Teaching from 4 years in many recognize institutes of Kanpur.

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Sarathkumar s

a year ago

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