Every shell fired by the cannon has a 85% probability of destroying its target.
(a)The cannon fires one shall at each of the 3 targets. What is the probability that the 3 targets are destroyed?
(b)The cannon can fire a maximum of 3 shells at a single target. What is the probability that the target is destroyed?

Already answered here: http://www.askmehelpdesk.com/mathematics/destroying-target-409381.html

Please, do not create multiple accounts.

Already answered here: http://www.askmehelpdesk.com/mathematics/destroying-target-409381.html

Please, do not create multiple accounts.

I've been seeing a trend of multiple posts lately, just the other day someone posted the same question 4 times., and 2 days before that it was 3. The moderator has been doing a great job deleting mult. posts though

Well, if that is as serious as that, RIP the post (report inappropriate post)

Please, do not create multiple accounts.

Can't prove it's the same person, but sure looks like it.

Not just "please" - it's against the rules:
Ask Me Help Desk - FAQ: Terms of Service, FAQ and How To Use This Site (http://www.askmehelpdesk.com/faq.php?faq=vb_faq#faq_faq_rules)
#9

>Thread Closed<
As Unknown008 correctly points out there is NO need to create multiple accounts simply to ask the same question !!