Answer:
The probability of having all four events is;
[tex]P(E_1)\times P(E_2)\times P(E_3)\times P(E_4)[/tex]Explanation:
Given that there are four independent events E1,E2,E3 and E4.
[tex]E_1,E_2,E_3,E_4[/tex]The probability of having all the four events;
[tex]P(E_1-and-E_2-and-E_3-and-E_4)[/tex]would be the product of the probability of each of the events;
[tex]P(E_1-and-E_2-and-E_3-and-E_4)=P(E_1)\times P(E_2)\times P(E_3)\times P(E_4)[/tex]Therefore, the probability of having all the four events is;
[tex]P(E_1)\times P(E_2)\times P(E_3)\times P(E_4)[/tex]