If 40 hamburgers feed 30 people how many hamburgers will be needed to feed 90

120 Burgers

Step-by-step explanation:

Your ratio is 40:30 burgers to people. You need to make the 30 into a 90. In other words, multiply by 3 on both sides. 40*3 and 30*3. This gives you a new ratio of 120:90 burgers to people. So take the 120 and you have your answer.

15%

step-by-step explanation:

use the table and count the number of guesses that has two correct answers.

the following are two correct answers

10010, 01100, 11000

a total of 3 numbers having 2 correct guesses out of 20 questions.

probability of getting 2 correct guesses = the number of questions getting 2 correct answers / total number of questions.

= 3/20

to convert it into percent multiply by 100, we get

= 3/20 * 100

= 15%

the answer is 15%

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