Selina Concise Mathematics Class 9 ICSE Solutions Mean and Median Selina ICSE Solutions for Class 9 Maths Chapter 19 Mean and Median (For Ungrouped Data Only) Exercise 19(A) 1. Find the mean of 43, 51, 50, 57 and 54. Solution 1: 2. Find the mean of first six natural numbers. Solution 2: 3. Find the mean of first ten odd natural number. Solution 3: 4. Find the mean of all factors of 10. Solution 4: 5. Find the mean of x + 3, x + 5, x + 7, x + 9 and x + 11. Solution 5: 6. If different values of variable x are 9.8, 5.4, 3.7, 1.7, 1.8, 2.6, 2.8, 8.6, 10.5 and 11.1; find ( i ) the mean (ii) the value of Solution 6: 7. The mean of 15 observations is 32. Find the resulting mean, if each observation is : (i) Increased by 3 (ii) Decreased by 7 (iii) Multiplied by 2 (iv) Divided by 0.5 (v) Increased by 60% (vi) Decreased by 20% Solution 7: 8. The mean of 5 numbers is 18. If one number is excluded, the mean o...
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