Answer:
The given probability distribution is a discrete probability distribution.
Step-by-step explanation:
We are given the following in the question:
x: 3 4 7
P(X=x): 0.19 0.3 0.51
Property of discrete probability distribution:
![\displaystyle\sum P(x_i) = 1](https://tex.z-dn.net/?f=%5Cdisplaystyle%5Csum%20P%28x_i%29%20%3D%201)
If the given probability distribution satisfies this property then, it is a discrete probability distribution.
![\displaystyle\sum P(x_i)\\\\= 0.19+0.3+0.51 \\= 1](https://tex.z-dn.net/?f=%5Cdisplaystyle%5Csum%20P%28x_i%29%5C%5C%5C%5C%3D%200.19%2B0.3%2B0.51%20%5C%5C%3D%201)
Thus, it satisfies the property for a discrete probability distribution.
Thus, the given probability distribution is a discrete probability distribution.