Gate Exam

Which of the following assertions are CORRECT?

P: Adding 7 to each entry in a list adds 7 to the mean of the list
Q: Adding 7 to each entry in a list adds 7 to the standard deviation of the list
R: Doubling each entry in a list doubles the mean of the list
S: Doubling each entry in a list leaves the standard deviation of the list unchanged
option
(A) P, Q
(B) Q, R
(C) P, R
(D) R, S

Read Solution (Total 1)

P,R -option C
11 years agoHelpfull: Yes(0) No(0)

Gate Other Question

An automobile plant contracted to buy shock absorbers from two suppliers X and Y. X supplies 60% and Y supplies 40% of the shock absorbers. All shock absorbers are subjected to a quality test. The ones that pass the quality test are considered reliable. Of X's shock absorbers, 96% are reliable. Of Y's shock absorbers, 72% are reliable. The probability that a randomly chosen shock absorber, which is found to be reliable, is made by Y is
option
(A) 0.288
(B) 0.334
(C) 0.667
(D) 0.720
Given the sequence of terms, AD CG FK JP, the next term is
option
(A) OV
(B) OW
(C) PV
(D) PW