how to compute quartiles

Compute: => 56 or 46 or 47 or 48..

In conventional X-rays an overlap of organs occurs and often difficult to interpret. These diagnostic difficulties have been eliminated by the use of an X-ray technique called computer Tomography (CT) scaning or computerised Axial Tomography (CAT) Scannin..

Based on the data in the stem and leaf plot, find the sum of the average of lower quartile and the middle quartile and the average of middle quartile and the upper quartile. => 50 or 40 or 43 or 44..

What are the values of lower quartile and upper quartile of a data set, if its least value is 171, middle quartile is 257 and the greatest value is 304? => 171, 304 or 171, 257 or 257, 304 or Cannot be determined..

The position of the greatest value in a set of data is 11. What are the positions of the lower quartile, the middle quartile and the upper quartile? => 1, 3, 6 or 3, 6, 9 or 3, middle of 5 th and 6 th positions, 10 or Cannot be determined..

There are 23 computers in the first room, 43 computers in the second room and 53 computers in the third room. Find the total number of computers in all the three rooms. => 99 or 119 or 120 or 129..

A modem (a modulator/demodulator) lets you connect your computer to a standard telephone line so that you can transmit and receive electronically transmitted dat..

The cost of a computer decreases from $800 to $720. What is the percent of decrease in the cost of the computer? => 10% or 12% or 15% or 13%..

An office has 3 floors. The first floor has 47 computers, the second floor has 45 computers, and the third floor has 43 computers. Find the total number of computers in the office. => 132 or 125 or 135 or 138..

In a computer-learning institute, there are 7 computers in each room. How many rooms are there in the institute if there are 63 computers altogether? => 8 or 4 or 10 or 9..