Exams

In the following question, out of the four alternatives, select the alternative which will improve the bracketed part of the sentence. In case no improvement is needed, select "no improvement". 
 
she thought she (have rediscovered) her real self after a long time

A shopkeeper mixed two verities of rice at Rs. 40/kg and Rs.60/kg in the ratio 3: 2 and sold the mixture at 10% profit. Find the  price per kg at which he sold the mixture?

There is certain relationship between two given words on one side of : : and one word is given on another side of : : while another word is to be found from the given alternatives, having the same relation with this word as the given pair has. Select the best alternatives/ relationship.

Contamination : Food :: Infection : ?

OMO refers to

Improve the bracketed part of the sentence.
The (reason of) her outburst in the party is yet unknown.

For an object, the state of rest is considered to be the state of ______ speed.

If 3*1 = 20, 6*1 = 50 and 2*6 = -40, then find the value of 5*8 = ?

By selling cloth at Rs. 9 per metre , a shopkeeper loses 10% . Find the rate at which it should be sold so as to earn profit of 15%