Решение задачи N1013 теория вероятностей Лапласа

1013. The probability that a dealer trading in securities will sell them is 0.7. How much securities should be in order to be able to affirm with a probability of 0.996, that the share sold among them will deviate from 0.7 to no more than 0.04 (in absolute value)?

Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)