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first find out the average

162

how you have calculated the average???

added

average is total / number

duhh i added them to get the "TOTAL NUMBER "

\[Average = {{15+22+36+30+38+21 }\over{6}}\]

so average is???

144.5

\[Average = {{15+22+36+30+38+21 }\over{6}}={{162}\over{6}}=27\]

tana do u know about variance

no

is this your variance???

idk