Select the missing term based on the given related pair of letter clusters.

ABC : ZYX :: DEF : ____

R+JM2$#QR?*O@7F3

Using the above sequence fill in the blank.

R#* : J?F :: $OJ : ___

The average marks obtained by a group of 10 students were 20. One student left the group as a result of which the average of the remaining students rose to 21. But another student joined, as a result of which the average marks of the group dropped a bit and became 20.6. What were the average marks obtained by the student who left and the one who joined?

Sound is a

The overall capabilities of CCT are understood by all because _____________ are information processing tools.

Which of the statements given below are correct?

A) Lewis Hamilton won the Formula One 2017 Chinese Grand Prix.

B) Belgium hosted the Tennis 2017 Davis Cup Final.

C) Sebastian Vettel won the Formula One 2017 Brazilian Grand Prix.

The process of transferring of charge from a charged object to the earth is called ______________.

The product of mass of a body and the acceleration produced in it equals the ___________ acting on it.