The ranfall (in mm) in a city on 7 days of a certain week was recorded as follows:

On how many days was the rainfall less than the mean rainfall?

The ranfall (in mm) in a city on 7 days of a certain week was recorded as follows: Find the range of the rainfall in the above data.

The rainfall (in mm) in a city on 7 days of a certain week was recorded as follows: Find the mean rainfall for the week.

If it has rained 276 mm in the last 3 days, how many cm of rain will fall in one full week ( 7 days ) ? Assume that the rain continues to fall at the same rate.

The sale of electric bulbs on different days of a week is shown below: Obseve the pictograph and answer the following questions : (a) How many bulbs were sold on Friday?

A contract on construction job specific a penalty for delay of completion beyond a certain date as follows : Rs. 200 for the first day, Rs.250 for the second day, Rs. 300 for the third day, etc., the penalty for each succeeding day being Rs. 50 more than for the preceding day. How much money the contractor has to pay as penalty, if he has delayed the work by 30 days ?

A contract on construction job specifies a penalty for delay of completionbeyond a certain data as follows: Rs 200 for the first day , Rs250 for the second day, Rs 300 for the third day , etc., the penalty for each succeeding day being Rs50 more than for the preceding day . How much money the contractor has to pay as penalty , if he has delayed the work by 30 days ?

A study was conducted to find out the concentration of sulphur dioxide in the air in parts per million (ppm) of a certain city. The data obtained for 30 days is as follows : You were asked to prepare a frequency distribution table, regarding the concentration of sulphur dioxide in the air in parts per million (ppm) of a certain city for 30 days . Using this table, find the probability of the concentration of sulphur dioxide in the interval 0.12-0.16 on any of these days.

The following are the ages of 300 patients getting medical treatment in a hospital on a particular day: Form the "less than type" cumulative frequency distribution table.

The pollution in a normal atmosphere is less than 0.01% . Due to leakage of a gas from a factory, the pollution is increased to 20%. If every day 80% of pollution is neutralised, in how many days the atmosphere will be normal?

The sale of electric bulbs on different days of a week is shown below: Obseve the pictograph and answer the following questions : (e) If one big carton can hold 9 bulbs. How many cartons were needed in the give week ?