If ax+by=6, bx-ay=2 & x2+y2=4 . Then find the value of a2+b2.
If a,b,c are in AP , p,q,r are in HP and ap,bq, cr are in GP , then p/r+r/p=?.
ANGO selected 2000 families at random and surveyed them to determine number of children in a family . The data is given below
|
Number of families |
Boy |
Girl |
|
400 600 300 500 200 |
1 2 1 2 0 |
1 1 2 0 2 |
If one family is chosen at random, then match Column-I with their corresponding probabilities in
Column-II.