Advertisements
Advertisements
प्रश्न
The harmonic mean of the numbers 2, 3, 4 is:
विकल्प
`12/13`
12
`36/13`
`13/36`
Advertisements
उत्तर
`36/13`
Explanation:
HM = `"n"/(1/"X"_1 + 1/"X"_2 + 1/"X"_3 + ... + 1/"X"_"n")`
Here n = 3
∴ HM = `3/(1/2 + 1/3 + 1/4)`
= `3/((6 + 4 + 3)/12)`
= `3/13 xx 12`
= `36/13`
APPEARS IN
संबंधित प्रश्न
The price of a commodity increased by 5% from 2004 to 2005, 8% from 2005 to 2006 and 77% from 2006 to 2007. Calculate the average increase from 2004 to 2007?
An aeroplane flies, along the four sides of a square at speeds of 100, 200, 300 and 400 kilometres per hour respectively. What is the average speed of the plane in its flight around the square?
A man travelled by car for 3 days. He covered 480 km each day. On the first day, he drove for 10 hours at 48 km an hour. On the second day, he drove for 12 hours at 40 km an hour and for the last day he drove for 15 hours at 32 km. What is his average speed?
Which of the following is positional measure?
Find out the GM for the following.
| Yield of Rice (tones) | No. of farms |
| 7.5 - 10.5 | 5 |
| 10.5 - 13.5 | 9 |
| 13.5 - 16.5 | 19 |
| 16.5 - 19.5 | 23 |
| 19.5 - 22.5 | 7 |
| 22.5 - 25.5 | 4 |
| 25.5 - 28.5 | 1 |
An investor buys ₹ 1,500 worth of shares in a company each month. During the first four months, he bought the shares at a price of ₹ 10, ₹ 15, ₹ 20 and ₹ 30 per share. What is the average price paid for the shares bought during these four months? Verify your result.
The measure of central tendency that does not get affected by extreme values:
Which of the following best describes a 'measure of central tendency'?
Which type of average is defined as the value repeated the maximum number of times in a dataset?
The sum of deviations of all observations from the arithmetic mean of a dataset is always ______.
