At Chennai it rained as much on Tuesday as on all the others days of the week combined. If the average rainfall for the whole week was 3 cm. How much did it rain on Tuesday?	Choose the correct choice from the following choices:
A) 2.625 cm	B) 3 cm	C) 10.5 cm	D) 15 cm	E) none of these

Rationale: total rainfall = 3 x 7 = 21 cm hence , rainfall received on tuesday = 21 / 2 ( as it rained as much on tuesday as on all the others days of the week combined ) = 10.5 cm . answer : c
Answer: C