Plzz help urgent..

1 r=0.5 summation xy=120 sigma y = 8 summation x^2 =90 n=?

2 regression lines -> 5x+7y-22=0 6x+2y-22=0 variance y is 15 sd of x=?

3 probable error is 0.2 no. of pairs is 9 correlation coefficient=?

4  in wich case binomial distribution is not applicable?

a)1 b)2 c)2.5

5 7 distinct things are 2 b divided in 3 groups consisting of 2, 2 n 3 things respectively no. of ways this can b done in?

6 for a set of 100 observations taking assumed mean as 4 yhe sum of deviations is -11cm n the sum of sqs f these deviations is 257 sq cms coeffient of variation =?

7 lim x->0 log(1+x)^1/x =?

8 r=0.8 coefficient of correlation=?

9 there r 4 hotels if 3 men check into hotels in a day what is the probability that they each r into different hotels?

10 intergration 0 to 1( root of x)/[root of x+ root of(1-x)] dx is?

11 in how many ways can the letters of da word "ALGEBRA" b arranged without changing da relative order of da vowels?

12 if relation b/w 2 random variables x n y is 2x+3y=4 then  correlation coefficient is?

13 a six face die is so biased that it is twice as likely 2 show an even no. as an odd no. when it is thrown what is  da probability dat the sum of the 2 no. is even?

14 furniture as on 1st jan 2010 Rs20000 during da yr a part of furniture  whose book vlue on 1st jan 2010 is Rs 1200 hs been xchanged wid anodr furniture by paying additional Rs 500 Ram charged depreciation at da rate of 10% pa the net amt of furniture 2 be shown in BS is?

15 integration x^3 root of (3+5x^4) dx is?

16 the mean monthly xpenditure of a batch of students is Rs 100 with SD is 20 if xpenditure is normally distributed find out the max xpenditure of dose 10% students whose xpenditure is lowest? also find the min xpenditure of dose 10% students whose xpenditure is highest?

thanxa lot....