Answer & Solution
Answer: Option B
Solution:
Percent of Laptops Dell and Lenovo sold by store Q = 23%
Number of Laptops Dell and Lenovo sold by store Q
$$\eqalign{
& = 4500\times\frac{23}{100} \cr
& = 45\times23 \cr
& = 1035 \cr} $$
Percent of Laptops Dell and Lenovo sold by R and S together
= 35% + 11%
= 46%
Now, total number of Laptops Lenovo and Dell sold by R and S together
$$\eqalign{
& = 4500\times\frac{46}{100} \cr
& = 2070 \cr} $$
Percent of Dell Laptops sold by R and S together
= 30% + 9%
= 39%
Number of Dell Laptops sold by R and S together
$$\eqalign{
& = 2400\times\frac{39}{100} \cr
& = 936 \cr} $$
Number of Lenovo Laptops = 2070 - 936 = 1134
Required difference
= 1134 - 1035
= 99