Home
Class 9
MATHS
The record of a weather station shows th...

The record of a weather station shows that out of the past 250 consecutive days, its weather forecasts were correct 175 times.
What is the probability that on a given day it was correct.

Text Solution

Verified by Experts

The correct Answer is:
`0.7`
Promotional Banner

Topper's Solved these Questions

  • PROBABILITY

    KUMAR PRAKASHAN|Exercise Skill Testing Exercise|8 Videos

  • PROBABILITY

    KUMAR PRAKASHAN|Exercise EXERCISE 15.1|23 Videos

  • POLYNOMIALS

    KUMAR PRAKASHAN|Exercise Multiple Choice Questions (MCQs)|20 Videos

  • QUADRILATERALS

    KUMAR PRAKASHAN|Exercise MULTIPLE CHOICE QUESTION(MCQs)|15 Videos

Similar Questions

Explore conceptually related problems

The record of a weather station shows that out of the past 250 consecutive days, its weather forecasts were correct 175 times. What is the probability that it was not correct on a given day ?

A factory has two machines A and B. Past record shows that machine A produced 60% of the items of output and machine B produced 40% of the items. Further, 2% of the items produced by machine A and 1% produced by machine B were defective. All the items are put into one stockpile and then one item is chosen at random from this and is found to be defective. What is the probability that it was produced by machine B?

A pendulum clock loses 12s a day if the temperature is 40^@C and gains 4s a day if the temperature is 20^@C , The temperature at which the clock will show correct time, and the co-efficient of linear expansion (alpha) of the metal of the pendulum shaft are respectively:

Block A of mass 5kg is placed on long block B having a mass of 5kg . The coefficient of friction between two block is 0.4 . There is no friction between the ground and lower block. The upper block is given a sudden velocity of 10m//s . The upper block slides toward right, so friction force acting on it will be toward left. Its reaction wall act on the lower block, which will act forward . The friction force absorbs x mechanical energy from upper block but supply only y mechanical energy to lower block. Due to friction the velocity of upper block reduces and velocity of lower block increases. This will continue till velocity of both the block get equal. Which curve shows the correct variation of velocity of each block v//s time?

A clock pendulum made of invar has a period of 2 s at 20^(@)C . If the clock is used in a climate where average temperature is 40^(@)C , what correction (in seconds ) may be necessary at the end of 10 days to the time given by clock? (alpha_("invar") = 7 xx 10^(-7) "^(@)C, 1 "day" = 8.64xx10^(4)s )

Fifty seeds were selected at random from each of 5 bags of seeds , and were kept under standardised conditions favourable to germination. After 20 days. the number of seeds which had germinated in each collection were counted and recorded as follows : {:("Bag",1,2,3,4,5),("Number of seeds",40,48,42,39,41),("germinated",,,,,):} What is the probability of germination of more than 40 seeds in a bag ?