11th maths chapter 9 exercise 9.4 intro + example 19,20

Exercise 9.1 solutions

Exercise 9.1 solutions

English class 9 chapter 2

Class 12 ncert maths solution chapter vector algebra exercise 10.2 Qno.4,5

A bag contains 20 coins. If the probability that the bag contains exactly 4 biased coin is 3/4 and that of exactly 5 biased coin is 2/3, then the probability that all the biased coin are sorted out from bag is exactly 10 draws is 5/(10)(^(16)C_6)/(^(20)C_9)+1/(11)(^(15)C_5)/(^(20)C_9) b. 2/(33)[(^(16)C_6+5^(15)C_5)/(^(20)C_9)] c. 5/(33)(^(16)C_7)/(^(20)C_9)+1/(11)(^(15)C_6)/(^(20)C_9) d. none of these

The 5th term of an A.P. is 11 and the 9th term is 7. Find the 16th term.

The 19th term of an A.P. is equal to three times its 9th term.If its 9th term is 19, find the A.P.

Find the 99^(th) term of the series : 7 (3)/(4) , 9 (1)/(2) , 11(1)/(4) ,…….