The mean length of a pop song released in the 1980's was 4 minutes and 8 seconds. The mean length of a pop song released in the 1990's was 4 minutes and 14 seconds. Which of the following must be true about the mean length of a pop song released between 1980 and 1999?

If the length of tangents from A,B,C to the incircle of Delta ABC are 4,6,8 then which of the following is(are) correct? (All symbols used have usual meaning in a triangle.

Anneke is completing in a 500-meter freestyle swim event, which consists of swimming the length of a pool 20 times. If Anneke averages 26.4 seconds per length of the pool. Which of the following equations could be used to determine the number of meter(m) Anneke has left in the event after swimming for s seconds?

If the length of tangents from A, B, C to the incircle of Delta ABC are 4,6,8 then which of the following is(are) correct? (All symbols used have usual meaning in a triangle.

If the length of tangents from A, B, C to the incircle of Delta ABC are 4,6,8 then which of the following is(are) correct? (All symbols used have usual meaning in a triangle.

If the length of tangents from A, B, C to the incircle of Delta ABC are 4,6,8 then which of the following is(are) correct? (All symbols used have usual meaning in a triangle.

The mean of a finite set S of numbers is 14, the median of this set of numbers is 12, and the standard deviation is 1.8. A new set T is formed by multiplying each member of the set S by 3. Which of the following statements must be true of the set T ? I. The mean of the numbers in set T is 42. II. The median of the numbers in set T is 36. III. The standard deviation of the numbers in set T is 5.4.

A metal rod of length 'L' and mass 'm' is pivoted at one end. A thin disc of mass 'M' and radius 'R' (ltL) is attached at its center to the free end of the rod. Consider two ways the disc is attached : (case A). The dise is not free to rotate about its centre and (case B) the disc is free to rotate about its centre. The rod disc system perfoms (SHM) in vertical plane after being released from the same displacement position. Which of the following statement (s) is (are) true ? .

Read the following information carefully to answer the given questions: Six film-P, Q, R, S, T and U-are to be released on consecutive Fridays. The schedule of the release is to be in accordance with the following conditions : (i) P must be released a week before T. (ii) R must not be released immediately after the first release. (iii) Q must be released on the Friday following the Friday on which U is released. (iv) S must be released on fifth Friday and should not be immediately preceded by Q. (v) T must not be released in the last. Film R cannot be released on which of the following Fridays in addition to second Friday ?

The wavelength of first line of Balmer series is 656 nm . Calculate the wave length of second line of this series. (Note : first line means n_(3) to n_(2) and second line means n_(4) to n_(2)