the mean of observations 18, 14,15,19 , 15 ,a ,12, 15 and 16 is 16. find the value of a. Then find the median and mode.

Question

the mean of observations 18, 14,15,19 , 15 ,a ,12, 15 and 16 is 16. find the value of a. Then find the median and mode.​

Arya · Answer

Answer:   sorry I don't know

Sarah · Answer

Answer:   18+14+15+19+15+a+12+15+16/9 = 16  32+34+a+27+16/9 = 16  66+a+43 = 144  109+ a =144  a = 35    median = 12,14,15,15,15,16,18,19,35   median = 15  mode = 15

Maya

Q1.Mental math
a) 2091+9___
b) 2091+909_
c) 2,40,701÷ 1000 Q=_,R=_
d)If 30×35=1050, what is 30×36?

find
the perimeter of
adjoining figure, find the value
of
a.
2a + 2
2a + 6

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