Maths

If the order of matrix A is m×p. And the order of B is p×n. Then the order of matrix AB is ?

For a non-trivial solution | A | is

A lot consists of 144 ball pens of which 20 ae defective and the others are good. Tanu will buy a pen if it is good but will not buy if it is defective. The shopkeeper draws one pen at random and gives it to her. The probability that she will buy that pen is

The probability of getting a spade card from a well shuffled deck of 52 cards is

The absccissa of the point of intersection of the less than type and of the more than type cumulative frequency curves of a grouped data gives its

An Airplane carries 500 passengers, 45% are men, 20% are children. The number of women in the airplane is

Ali spends $30 everyday, but on Sunday, he spends $10 only. The ratio of amount spent on Sunday to everyday should be

In a language survey of students it is found that 80 students know English, 60 know French, 50 know German, 30 known English and French, 20 know French and German, 15 know English and German and 10 students know all the three languages.

How many students know at least one language?

Let x and y are sets and I x I and l y I are their respective cardinalities. It is given that there are exactly 97 functions from x to y. From this one can conclude that

If F1, F2 and F3 are propositional formulae such that F1 ^ F2 → F3 and F1 ^ F2→F3 are both tautologies, then which of the following is TRUE?