IBPS RRBs Officer Scale I and II 12 Se 2015 Paper

(2) Total number of cellular phones sold by store B
⇒

6400×21

100

= 1344
Total number of Nokia phones sold by store B
=

3000×18

100

=540
∴ Number of Samsung phones
= 1344 – 540 = 804
Total number of cellular phones sold by store C
=

6400×15

100

=960
Number of Nokia phones sold by this store
=

3000×20

100

=600
∴ Number of Samsung phones
= 960 – 600 = 360
Number of cellular phones sold by store D
=

6400×33]

100

=2112
Number of Nokia phones sold by this store
=

3000×30

100

=900
∴ Number of Samsung phones
= 2112 – 900 = 1212
∴ Required average
=

804+360+1212

3

=

2376

3

= 792