NIELIT STQC 2021 Quiz-15

The expectation of discrete random variable X whose probability function is given by is

In the given table, P(x) and discrete random variable is given. Find the standard deviation of x. P(x) is probability density function.

How many subsets of {1, 2, 3 … 11} contain at least one even integer?

What is the Cartesian product of A = {1,2} and B = {a, b}?

L1 = { | m ≥ 0}

L2 = { | m ≥ 0}

L1 ∙ L2 = ?

(0 + ε ) (1 + ε ) represents the set?

The characteristic equation of JK flip flop:

Let E1 and E2 be two entities in an E/R diagram with simple single-valued attributes. R1 and R2 are two relationships between E1 and E2, where R1 is one-to-many and R2 is many-to-many. R1 and R2 do not have any attributes of their own. What is the minimum number of tables required to represent this situation in the relational model?

If x is a one-dimensional array, then?