The fraction 3/10 represents the probability of pulling out a pink marble at random. Since the first one is put back, this means the fraction 3/10 stays the same on the second draw as well.

We use the idea mentioned in the hint to multiply the fractions:

(3/10)*(3/10) = (3*3)/(10*10) = 9/100

The probability of pulling two pink marbles in a row is 9/100, where the first marble is put back.

Effectively, if you were given 100 tries at doing this, you should expect about 9 of those times you get 2 pink marbles in a row.

4 0

3 years ago

A die with faces numbered 1 to 6 is rolled once .what is the probability of obtaining 1 or 4

Radda [10]

Answer:

the answer is 2/6

Step-by-step explanation:

2 chances out of 6 events.

4 0

3 years ago

Read 2 more answers

A DJ has a total of 1075 dance, rock, and country songs on her system. The dance selection is three times the size of the rock s

adoni [48]

$D+R+C=1075\\D=3R\\C=R+105\\\\(3R)+R+(R+105)=1075\\5R=970\\R=194\\\\D=3(194)=\\D=582\\\\C=(196)+105=\\C=301$

582 dance songs.
194 rock songs.
301 country songs.

5 0

3 years ago