The number of observations n<span> must be large enough, and the value of p so that both np and </span>n<span>(1 - p) are </span>greater than or equal to 10<span>. This is a rule ... </span>n<span>(1 - p) = 75. Since both of these numbers are </span>greater than 10<span>, the appropriate </span>normal<span> distribution will do a fairly </span>good<span> job of estimating </span>binomial<span>probabilities. hope i help am sorry if i didnt </span>
First, we have to find the total number of marbles in the bag. 12+20+17=49. So there are 49 marbles in the bag. We know that 20+17=37, so the chances of pulling a marble that isn't red is 37/49, which can't be reduced further.
Hope this helps, and please Brainliest me if it did!
Answer:

Step-by-step explanation:
Remember that:

Step-by-step explanation:
2:3 and 4:6 is proportional because if you simplify 4:6 it will equal 2:3.
1:4 and 6:18 is not proportional because if you simplify you would not get 1:4.
3:5 and 1:3 is not proportional because you can't simplify it any further and they do not equal each other.
2:5 and 8:20 is proportional because if you take 2:5 and multiply each number by 4 you would get 8:20.
4:9 and 12:27 is proportional because you can simplify 12:27 and get 4:9.
6:15 and 2:5 is proportional because you can multiply 2:5 by 3 and get 6:15.