Question

plz help i will mark u brainliest

Answer 1

Step-by-step explanation:

$6 \sqrt{5} - 4 \sqrt{5} + \sqrt{125}$

$(6 - 4) \sqrt{5} + \sqrt{5 \times 5 \times 5}$

$2 \sqrt{5} + 5 \sqrt{5}$

$7 \sqrt{5}$

n (A) = 25

n (AUB) = 29

n (AnB) = 9

n (B) = ?

n (A) + n (B) = n ( AUB) + n (AnB)

25 + n (B) = 29 + 9

25 + n (B) = 38

n (B) = 38 - 25

n (B) = 13