28x + 8y + 2 is the simplified version.
Yes ! I can help you.
-- Take each fraction.
-- Do the division . . . (top number) divided by (bottom number) .
-- Write the whole number from the quotient.
Save the remainder.
-- After the whole number, write a fraction.
Copy the original bottom number to the bottom of the fraction.
-- Copy the remainder from the division to the top of the fraction.
Bada-bing ! There's your mixed number.
Answer:

Explanation:
From the question, we have it that the probability of heads coming up every time or tail coming up every time is 1:7 if the coin is tossed in 4 tosses
What this means is that we have a probability of 1/8 of head showing up and a probability of 7/8 that a tail will show up in each toss of the coin
For four throws, it means all four are heads or all four are tails
If all four are heads, we have the probability of this happening as:

if all four are tails, we have the probability as:

Now, the probability of either heads or all tails after 4 tosses will be: