20-2x
20-x
20
20+x
20+2x
What is the average (arithmetic mean) of the list of number above?

What is the arithmetic mean of first 20 odd natural numbers?

If the arithmetic Mean of 8 and 'x' is 20 ,then find 'x' ?

The mean of 20 numbers is 20. if 2 is added to each of the first 10 numbers. Find the mean of the new set of 20 numbers.

2(5x − 20) − (15 + 8x) = 7 What value of x satisfies the equation above?

If 2% of x is 20, then x=

What are the zeroes of the polynomial 2x^(2)+14x+20  ?

The mean of 11 numbers is found to be 20.If the number 20 is added to this list of numbers,what is the new mean?

An elements has three isotopes X^(20), X^(21) and X^(22) . Percentage abundance (mole %) of X^(20) is 90 and average atomic mass of X is 20.18 . Select correct option (s) -