Answer:
see below
Explanation:
Mean is the average of a set of data or numbers. if the mean is 13, it implies that on average, the width of one iPad is 13cm.
a). Width of 12 iPads is 13cm.
Total width will be 12 x 13
= 156 cm
b). Total width of candles
mean of 8 candles is 12 cm
total width = 8 x 12
=96 cm
c). mean of iPads and candles
=width of iPads + width of candles divided by total of candles and iPads
= (156cm + 96cm) / (12 + 8)
=252 /20
=12.6 cm
