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The rainfall in Shillong for the first two days was in the ratio of 6 : 7. The average rainfall for the last four days was recorded to be 0.90 inch. The average rainfall of six days was 1.25 inch. Which of the following is/are correct? A. Average rainfall on 2nd day is 2.8 inch B. Average rainfall on 1st day is 1.8 inch C. Average rainfall on 2nd day is 2.1 inch D. Average rainfall on 1st day is 2.4 inch
Consider the following statements: 1. The normal annual rainfall of a station is obtained as the arithmetic average of the successive annual rainfall in the last 30 years. 2. The “normal rainfalls” are updated by deleting the needful number of oldest years’ data from the record and adding the needful number of most recent years’ data to the record. 3. The standard deviation computed for the rainfall data is taken as a measure of the variability of the rainfall during the self-same set of years. 4. If the observed rainfall in any year is less than the current average annual rainfall, then that year is called a dry year. Which of the above statements are correct?
The monthly rainfall chart based on 50 years of rainfall in Agra is shown in the following figure. Which of the following are true? (k percentile is the value such that k percent of the data fall below that value) (i) On average, it rains more in July than in December (ii) Every year, the amount of rainfall in August is more than that in January (iii) July rainfall can be estimated with better confidence than February rainfall (iv) In August, there is at least 500 mm of rainfall
A and B have their annual average income Rs. 80,000.
B and C have their annual average income Rs. 75,000.
C and A have their annual average income Rs. 78,000. The annual income of A is ?
Directions : In each of the following questions a statement is given, followed by two conclusions. Give answer :

Statements : The average number of persons per household is 5 in urban areas whereas it is 7 in rural areas. The national average is 6.

Conclusions :
I. The population per unit area in the rural areas is higher than in the urban areas.
II. More persons live in the same household in the rural areas as compared to those in the urban areas.
The rainfall in Jhunjhunu for the last two days was in the ratio of 2 : 3. The average rainfall for the first five days was recorded to be 0.83 cm. The average rainfall of all seven days was 0.80 cm. If n is the rainfall on the 7th day, which of the following is/are correct? A. n is a perfect square B. n/10 is a perfect cube C. n – 2 is a perfect square D. n = 8.7 mm
The average rainfall of January, February, and March was 280 mm. The average rainfall of February, March, and April was 282 mm. If the rainfall in April was 284 mm, what was the rainfall in January?
As a salesperson, Poly can choose one of two methods of annual payment either an annual salary of Tk. 35,000 with no commission or an annual salary of Tk. 10,000 plus a 20 percent commission on her total annual sales. What must her total annual sales be to give her the same annual pay with either method?
Consider the following statements regarding rainfall during the winter season in India.  I. Due to the accumulation of moisture from the Bay of Bengal, rainfall takes place in Tamil Nadu, Andhra Pradesh, Karnataka and Kerala.  II. The northeastern part of India does not experience any rainfall during the winter season.  III. There is some rainfall during the western disturbances in north-west India.  Which among the above statements is/are correct?
The following table gives the distribution of normal annual rainfall in 100 places in Odisha. What is the normal annual rainfall in the state? Rainfall Class (in cm) No. of Places 70-90 10 90-110 20 110-130 40 130-150 20 150-170 10