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Q #16
⏰ :

Directions: Read the following information to answer the question.

If 8 arithmetic means a1,a2 , a3, a4 ,a5 ,a6 , a7 ,a8 are inserted between 2 & 38 , then find the value of 4th arithmetic mean .

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Solution : If we consider a = 2, then a + 9d = 38 , 9d = 36, -> d =4 , therefore a +4d = 2 + 4 x 4 = 18 .

Q #17
⏰ :

Directions: Read the following information to answer the question.

There are 80 players in a school who play one or more than one games. These games are Golf , volleyball & Cricket . If 40 play golf , 30 play cricket & 30 play volleyball. 15 play both Golf & cricket ,& 14 of them play both cricket & volleyball. Number of players who play Golf & volleyball is same as the number of players playing all the 3 games. What is the maximum no. of players possible who play all the 3 games?

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Solution:

G represents Golf 

V represents Volleyball

C represents Cricket . 


On putting values ,therefore a = 25 , e = 15- g , f= 14-g, c =1+g ,b= 16

To get maximum value of g possible , there are 2 constraints

e = 15- g , f= 14-g  … therefore the maxm value of g = 14

 


Q #18
⏰ :

Directions: Read the following information to answer the question.

Let En = 2 – 4 + 6 – 8 + 10 ---------(-1)n+1 (2n) and E1n = 4 + 1 – 2 + 12 + 3 – 6 + 36 + 9 – 18 ----------- n terms What is the value of E110?

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Q #19
⏰ :

Directions: Read the following information to answer the question.

Let En = 2 – 4 + 6 – 8 + 10 ---------(-1)n+1 (2n) and E1n = 4 + 1 – 2 + 12 + 3 – 6 + 36 + 9 – 18 ----------- n terms If En = 452 then what is the value of n?

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Q #20
⏰ :

Directions: Read the following information to answer the question.

Let En = 2 – 4 + 6 – 8 + 10 ---------(-1)n+1 (2n) and E1n = 4 + 1 – 2 + 12 + 3 – 6 + 36 + 9 – 18 ----------- n terms If 2E1n + 3 = 816 then what is the value of n?

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