Question

please help me for this problem number 9,10,11

Answer 1

for 10th

DE ll BC

in △ ADE AND ABC

by Basic proportionality theorem

AD/DB=AE/EC.........1

∠ A = ∠ A....2......common angle

by 1 and 2

both △ are similar ........by AA TEST



for 11th

let S be sample space
when dice is rolled
S={1,2,3,4,5,6}
nS={6}

LET E BE the event such that
number is even
therefore
E={2,4,6}
nE={3}

P(e)= nE / nS = 3/6 = 1/2