The following table shows the probability distribution for a discrete random variable.
x 13| 16 |17| 21| 23| 25 |26 |31
p(x) 0.07 |0.21| 0.17| 0.25| 0.05| 0.04| 0.13| 0.08
what is the mean of this discrete random variable. that is, what is e(x), the expected value of x?

X            |   13  |    16 |   17|    21|    23|    25 |   26 |   31|     |
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P(X)       | 0.07 |  0.21| 0.17| 0.25| 0.05|  0.04| 0.13|  0.08   |
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X.P(X)    | 0.91 |  3.36| 2.89| 5.25| 1.15|  1.00| 3.38|  2.48   |
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E(X) = ∑(X.P(X) =(0.91+3.36+2.89+ 5.25+ 1.15+ 1.00+ 3.38+  2.48)
  
E(X) = ∑(X.P(X) = 20.42

Pls review the calculation to be on the safe side