Abe, Boris, Cal, and David all proposed to Ellie on Friday. Abe proposed at 5, Boris proposed at 6, Cal proposed at 7 and David proposed at 8. Ellie accepted the last of the four proposals. Some clues: 1-the
times may be am or pm. 2Boris proposed before Abe. 3- At lease one suitor proposed between the
proposals of Cal and David. 4-Cal did not propose between Boris and Abe. Whose proposal did Ellie
accept. Explain.

David's

Step-by-step explanation:

David proposed at 8, making him the latest of the four. The question states that Ellie accepted the last of the 4 proposals, so David's must be the one she accepted. All other information in the question is irrelevant.

0.16 or 16%

step-by-step explanation:

lets take a coin for example.

if you toss it twice, it has a 1/4 chance of landing on heads both times because 1/2 * 1/2 is 1/4.

with the cards, the chance of picking dog is 0.4. having two people pick one is like picking a card twice in a row. so 0.4 * 0.4 is 0.16, or 16%

pay attention in your classes and concentrate the best thing you can do to raise your test scores is to pay attention when you're supposed to be learning the material: in class!

take good notes.

do your homework.

use mnemonics and other tricks.

do practice tests.

note: the best i know.