Tuesday, March 28, 2017
Monday, March 27, 2017
Sunday, March 26, 2017
Statistics - Important Points
CBSE Class 9 - Mathematics① In statistics we study collection, presentation analysis and interpretation of data.
② Facts or figures collected with a definite purpose are called data.
③ Data are fundamental. Statistical tests are performed on raw not manipulated data.
④ The number of times an observation occurs in the given data is called frequency of the observation.
⑤ Class intervals are the groups in which all observations are divided.
Friday, March 24, 2017
Knowing Our Numbers
NCERT Ex 1.2 Solutions
CBSE Class 6 Maths
Q1. A book exhibition was held for four days in a school. The number of tickets sold at the counter on the first, second, third and final day was respectively 1094, 1812, 2050 and 2751. Find the total number of tickets sold on all the four days.
Number of tickets sold on first day = 1,094
Number of tickets sold on second day = 1,812
Number of tickets sold on third day = 2,050
Number of tickets sold on fourth day = 2,751
Total tickets sold = 7,707
∴ 7,707 tickets were sold on all the four days.
Q2: Shekhar is a famous cricket player. He has so far scored 6980 runs in test matches. He wishes to complete 10,000 runs. How many more runs does he need?
Runs to achieve = 10,000
Runs scored = – 6,980
Runs required = 3,020
∴ he needs 3,020 more runs.