Answer:
Step-by-step explanation:
There are 12 E's out of 100 tiles.
Tiles are not replaced.
<u>The probability of each of first 4 E's is:</u>
- The first E ⇒ P(E) = 12/100 = 3/25
- The second E ⇒ P(E) = 11/99 = 1/9
- The third E ⇒ P(E) = 10/98 = 5/49
- The fourth E ⇒ P(E) = 9/97
<u>The probability of 4 E's is:</u>
- P(4 E's) = 3/25*1/9*5/49*9/97 = 3 / (5*49*97) = 3 / 23765
Answer:
£0.40
Step-by-step explanation:
Divide £40 by £3.30 to find the number she can buy
£40 ÷ £3.30 = 12.1212..
That is she can buy 12 light bulbs
cost = 12 × £3.30 = £39.60
change = £40 - £39.60 = £0.40
Answer:
x is 13
y is 39
Step-by-step explanation:
Combine the terms by multiplying into a single fraction.

Find the common denominator.

Combine fractions with the lowest common denominator.

Multiply the numbers.

Combine the multiplied terms into a single fraction

Find the common denominator.

Combine fractions with the lowest common denominator.

Multiply the numbers.

Eliminate the denominators of the fractions.

Cancel the multiplied terms that are in the denominator.

To distribute.

Add 28 to both sides.

Simplify

Subtract 3x from both sides.

Simplify

Divide both sides by the same factor.

Simplify

↓
<h3>Verification</h3>
Let x=12.









Checked ✅