Hey can you me posted picture of question

Number of outcomes when flipping a coin = 2
Favorable outcome is landing on head.
So,number of favorable outcomes = 1

Probability of getting a head when flipping a coin = 

Number of outcomes when rolling a dice = 6
Favorable outcomes are rolling 4,5 or 6.
So,number of favorable outcomes = 3

Probability of getting 4 or a bigger number when rolling a dice = 

Thus the probability of getting a head when flipping a coin and getting a number equal to or greater than 4 when a dice is rolled = 

So, option A gives the correct answer

Agc and bgd are vertical angles

8-2x+3x2=6 and six is your answer