Question

1. Find the mean of first seven even numbers.
2. Find the median of first 9 odd numbers.
3. Find the range and mean of the following values.
16 18 13 13 14 21 15 18 12 17
4. Scores of a test were: 7,6,4,5,6,7,8,9,7. Find the median and mode.
5. A number from 1to10 is chosen at random .What is the probability of choosing:
a) an even number c) a prime number
b) an odd number

Answer 1

Answer:

Step-by-step explanation:

1) the numbers are , 2,4,6,8,10,12,14

total numbers = 7

∴mean = 2+4+6+8+10+12+14 ÷ 7

           = 56 ÷ 7

           =8

2)  the first 9 odd numbers are , 1,3,5,7,9,11,13,15,17.

 median = last number + 1 ÷ 2

              =17+1 /2

              =18/2

              =9