Risk ID Probability Cost impact

Risk $10,05$ R$205000$

Risk $20,27$ R$73000$

Risk $30,15$ R$132000$

Risk $40,015$ R$320000$

Risk $50,31$ R$46000$

Risk $60,21$ R$150000$

Risk $70,1$ R$96000$

Risk $80,07$ R$185000$

Risk $90,12$ R$28000$

Risk $100,20$ R$244000$

$1\mathrm{.}1$ Calculate the probability that

$1\mathrm{.}1\mathrm{.}1$ all the risks occur

$1\mathrm{.}1\mathrm{.}2$ no risk occurs

$1\mathrm{.}1\mathrm{.}3$ at least one risk occurs