Which of the following pairs of sets can be placed in a onet

Which of the following pairs of sets can be placed in a one-to-one correspondence? {1, 2, 3, 4} and {m, n, b, s} {a, b, c, d, ..., v) and {1, 2, 3, ..., 22} {t|t is a letter in the word pulp} and {1, 2, 3, 4} Can the sets {1, 2, 3, 4} and {m, n, b, s} be placed in a one-to-one correspondence? No Yes Can the sets {a, b, c, ..., v) and {1, 2, 3, ..., 22} be placed in a one-to-one correspondence? No Yes Can the sets {t|t is a letter in the word pulp} and {1, 2, 3, 4} be placed in a one-to-one correspondence? No Yes

Solution

for one-to-one

number of elements in each set should be equal and each value should be unique.

A.

Both set have 4 unique values, so YES, it can be placed as one-to-one.

B.

first set has 22 unique values and second set has 23 unique number so it cannot beplaced as one-to-one.

C, first has 4 alphabet but they are not unique so It cannot be placed as one-to-one.