Question: a grocer has a sale of rs . 800 , rs . 900 , rs . 1000 , rs . 700 and rs . 800 for 5 consecutive months . how much sale must he have in the sixth month so that he gets an average sale of rs . 850 ?
A) s . 440
B) s . 850
C) s . 450
D) s . 900
E) s . 950
Correct answer: d
Grade: 7 | Topic: Statistics and Probability | Difficulty: Medium | Standard: 7.SP.B.3