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Survival Probability expressions

A

actuary-to-be

Member
Hello

I am wondering whether the two attached expressions are both correct?

I seem to get confused about minor differences in notation.
Screen Shot 2017-07-30 at 20.32.47.png

Would anyone be able to confirm?

Thank you
 
Yes these both can be used interchangably.
P(Kx =k)= kPx*qx+k,probability that x survives k years before death
P(Kx = n)=nPx*qx+n,probability that x survives n years before death.

Also in both we sum accordingly.
 
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