Question

22. Five numbers are arranged in increasing order.
The average of the first four numbers is 34 and the
average of the last four numbers is 40.The difference
of the last and the First number is:
(6) 6
(d) 23
La) 24
(c) 30​

Answer 1

Answer: (a) 6

Step-by-step explanation:

Average of first four number = 34

Average of last four number = 40

difference =40 - 34 = 6

Answer 2

Answer:

24

Step-by-step explanation:

WE CAN SAY-: Average of 1st four numbers,

=>x1+x2+x3+x4/4=34……..(1)

THEREFORE Average of last four numbers,

=>x2+x3+x4+x5/4=40…….(2)

NOW, Subtract (1) from (2), we get the difference of first and last number is

=>x2+x3+x4+x5/4 - (x1+x2+x3+x4)/4

x2+x3+x4+x5/4 - (x1+x2+x3+x4)/4= 40–34

x2+x3+x4+x5/4 - (x1+x2+x3+x4)/4= 40–34x2+x3+x4+x5-x1-x2-x3-x4/4 = 6

=>(Remove the brackets and multiply by minus sign)

(Remove the brackets and multiply by minus sign)x5-x1/4 = 6

=>>x5-x1 = 6*4 = 24 #YOUR ANSWER

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