2. List the like terms in each of the following:
i) 2a2b2 , 6a2b, 2ab2 , -3a2b2 , 7ab2 , -9a2b

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.