Advertisements
Advertisements
प्रश्न
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?
Advertisements
उत्तर
Total distance covered 480 km.
The first-day distance covered 48 km.
The second-day distance covered 40 km.
The third-day distance covered 32 km.
Number of observations = 3
Average speed = HM = `"N"/(sum 1/"x")`
= `3/((1/48 + 1/40 + 1/32))`
= `3/(((10 + 12 + 15)/480))`
= `(3 xx 480)/37`
= 38.9189
= 38.92 km/hr
APPEARS IN
संबंधित प्रश्न
Find lower quartile, upper quartile, 7th decile, 5th decile and 60th percentile for the following frequency distribution.
| Wages | 10 - 20 | 20 - 30 | 30 - 40 | 40 - 50 | 50 - 60 | 60 - 70 | 70 - 80 |
| Frequency | 1 | 3 | 11 | 21 | 43 | 32 | 9 |
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?
When an observation in the data is zero, then its geometric mean is __________.
The geometric mean of two numbers 8 and 18 shall be
Median is the same as:
The median of 10, 14, 11, 9, 8, 12, 6 is
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 |
Which of the following best describes a 'measure of central tendency'?
The sum of deviations of all observations from the arithmetic mean of a dataset is always ______.
A frequency distribution has two classes with the highest and equal frequencies. What can be said about its mode?
