Question

pls answer this questions fast
note : who will give correct answer by step by step they will only receive the money in their account​

Answer 1

Answer:

1st answer is 30 and 2nd answer is 4

Answer 2

Answer:

Given,

$a) \\ \\ \sf \: n(A) = 25 \\ \sf \: n(B) = 15 \\ \sf \: n(A \cap \: B ) = 10 \\ \sf \: n(A \cup \: B ) = \: to \: find \\ \bf \: we \: know \: that \\ \\ \sf \: n(A \cup \: B ) = n(A ) + n( B ) - n(A \cap \: B ) \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 25 + 15 - 10 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 30$

$b) \\ \\ \sf \: n(A ) = 20 \\ \sf \: n(B ) = 8 \\ \sf \: n(A \cup \: B ) = 24 \\ \sf \: n(A \cap \: B ) \: = \: to \: find \\ \bf \: we \: know \: that \\ \\ \sf \: n(A \cup \: B ) = n(A ) + n( B ) - n(A \cap \: B ) \\ = > \sf \: n(A \cap \: B ) = n(A ) + n( B ) - n(A \cup \: B ) \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 20 + 8 - 24 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 4$