<prompt> For Mrs Rekha, probability of having a baby of BW 2500 gms is 0.50 and of having a BW 2500-2999 gms is 0.20. So the probability for Mrs. Rekha to have a baby of BW 3 kg is0.310.10.7  <response>: Here, for Mrs Rekha, probability of having a baby of BW 2500 gms, PA is 0.50 and of having a BW 2500-2999 gms, PB is 0.20Thus, the probability for Mrs. Rekha to have a baby of BW 3 kg isPTotal PA PB 0.50 0.20 0.70 70There is one more possibility, i.e. probability of having a baby of BW 3 kg, whose probability PC will be 1 PA PB 0.30 30. 