Let Y have the PMF  𝑝 𝑌 ( 𝑦 ) = 𝑃 ( 𝑌 = 𝑦 ) = 𝑦 10 for y = 1, 2, 3, 4.  What is 𝑃 ( 𝑌 ≤ 2 ) ?单项选择题

A

1/10

B

2/10

C

3/10

D

7/10

E

9/10

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