IIT-JEE Exam Numerical Ability Algebra

If the indian govt. allows to drive a vehicle on right side of a road instead of left then what will be change in the radius of Earth?
a)increase
b)decrease
c)remains the same
d)none of these

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IIT-JEE Other Question

: Three machines A, B and C produce respectively 60%, 30% and 10 % of the total number of items of a factory. The percentage of defectives output of these machines are 2%, 3% and 4%, respectively. If an item is selected at random and is found defective. Find the probability that the selected item was produced by machine C. in a certain code,MONKEY is written as XDJMNL.how is TIGER written in that code