Grace is helping her younger brother clean up his toys. She first picks up only 2 Lego pieces and places them
in the toy chest. Grace then selects 4 Lego pieces to
put away in the toy chest. The next time, she picks up
8 Lego pieces. Grace continues this pattern until all
128 Lego pieces are placed into the toy chest.

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%

you.

160

step-by-step explanation:

idk

i hope i