Probability question..should be easy but wording is bad.?

Neither. Probabilities should be represented as numbers between 0 and 1 inclusive. The statement is nonsensical (sorry). The English language is inherently ambiguous and also misused. It sounds like the communicator is trying to say that we should double the probability (which doesn't make much sense either).

The word "by" implied multiplication by 100% ==> 1.0. You would "increase" the probability by nothing. The answer is .30 which is (.30) X (1.00) = .30.

Number 1

[edit] If you increase anything by 100% then you are doubling the thing you are increasing. Since you are increasing your likelihood of winning, the correct interpretation is that you are going to have a 60% chance of winning.

Either way, you should buy a ticket!!!

the first one is obviously the right answer..it makes sense,plain and simple!

presuming that u got this sum as homework from school,i should say that the second possibility may be ruled out because the answer to that is infinite.it can be proved right or wrong.so obviously the school won't give u a sum which has a controversy in it.

so yeah it's the first one,after using the spell,you will have a 60% chance of winning the lottery,since your chances have been doubled.

hope u understand.good luck.

One !

aside from the fact that 100% of 30 is 30 ,not 100

The definition of percentage is OUT OF ONE HUNDRED

x/100 that is why the symbol is %

30/100 = 30 %

A common misconception ( even with so called accountants I have met ) is that some thing is 100% profit

IT CAN NOT BE UNLESS YOU GOT IT FOR ZERO

BY at £50 sell at £150 is NOT 150% profit

It is 100/150 ( gain over total) = 66.6% profit