Question

The mean of 3. 1.5. x and 9 is 4. then find the value of x.​

Answer 1

Answer:

mean is the average of all numbers

so in this question add all the numbers and divide by the total number of values

4=3+1.5+x+9/4

4=13.5+x/4

4×4=13.5+x

16=13.5+x

16-13.5=x

2.5=x

SO THE VALUE OF X IS 2.5

Answer 2

Answer:

3+1.5+x+9÷4=9

=>13.5+x=36

=>x=22.5

‌‌‌‌‌‌Therefore,x=22.5