Question

if the mean mean of the given data is 30.Find the unknown number in the data : 28,22,32,37,x​

Answer 1

Answer:-

Given terms

• 28,22,32,37,x
• Number of terms=5
• Mean=30

We know

$\boxed{\sf Mean=\dfrac{Sum\:of\:terms}{Number\:of\;terms}}$

$\\ \sf\longmapsto 30=\dfrac{22+28+32+37+x}{5}$

$\\ \sf\longmapsto 30=\dfrac{119+x}{5}$

• Use cross multiplication

$\\ \sf\longmapsto 119+x=30(5)=150$

$\\ \sf\longmapsto x=150-119$

$\\ \sf\longmapsto x=31$

Answer 2

Answer:

31

Step-by-step explanation:

mean = (sum of observations)/no. of observation

30 = (28 + 22 + 32 + 37 + X)/5

30 = (119 + X)/5

30 × 5 = 119 + X

150 = 119 + X

150 - 119 = X

31 = X

X = 31

Hope it's helpful for you!