Key word here, "or"...so you would add the unique probabilities of either together...
P(e)=1/2, P(>4)=3/10 (the numerator is three rather than five because 2 and 4 were already accounted for in P(e)...
P=5/10+3/10=8/10=4/5 (80%)
P=0.8
<h2>
Explanation:</h2>
The yard, whose symbol is yd, is standardized as 0.9144 meters since 1959. The unit system that use it is both the imperial and the US units. On the other hand, the foot, whose symbol is ft, is standardized as 0.3048 meter. It is also used by the imperial and US units. The relationship between these two units is:

The answer is the one you put that and it says its correct
Which ever expression is 3x + 21 + 10 ..... 21 + 10 = 31 .... So it'll be 3x + 31 .