Please help me please​

Successful implementation of a new system is based on three independent modules. module 1 works properly with probability 0.96. for modules 2 and 3, these probabilities equal 0.95 and 0.90. compute the probability that at least one of these three modules fails to work properly.

If 25% of y is 30, what is 60% of y?

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.