Vaccine for rabies was first produced by

Biogas is produced by

Water gas is produced by:

Chlorine is produced by the

Vaccine are prepared from:

Fill up the blank. The first vaccine was discovered by _______

Vaccination provides :

The first hormone artificially produced by culturing bacteria is -----.

Amanufacturer has three machine operators A, B and C. The first operator A produces 1% defective items, whereas the other two operators B and C produces 5% and 7% defective items, respectively. A is on the job for 50% of the time, B on the job for 30% of the time and C is on the job for 20% of the time. A defective item is produced, what is the probability that it was produced by A.

Peyers patches produce: