in this the 5th problem please solve it and send me the answer right now
one bag contains 3 red and 5 black balls. Another bag contain 6 red and 4 black balls . A ball is transferred from first bag to the second bag and then a ball is drawn from the second bag. Find the probability that the ball drawn is red
यदि बिंदुओ A,B,C और D के निदॆशांक कृमशः (1,2,3),(4,5,7),(-4,3,-6)और(2,9,2)है तो ABऔर CDरेखाओ के बीच का कोण ज्ञात कीजिए ।