(i) Find x if 15, 12, 11, x.+6,7,5, 4 are in order and their median is 10.
(ii) Find x if 8, 10, x -1, x + 3, 17, 19 are in order and their median is 14.
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Answer:
- x=4
- x=13
Step-by-step explanation:
1.) The no. of observation is odd = 7( odd)
Median= (n+1)/2 th term
10 = (7+1)/2. th term
10 =4th term
10 =x+6
10 -6 =x
4= x Ans
2.) The no. of observation is even = 6(even)
Median= ((n/2)+(n/2 +1) th term)/2
14 = ((6/2)+(6/2 +1) th term)/2
14 = (3rd term + 4th term)/2
14 = (x-1+x+3)/2
14 = (2x+2)/2
14×2 =2x+2
28-2= 2x
26/2 =x
13=x Ans
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