Example 6. The frequency of normal seed germination $W=0.97$. Out of the sown seeds, 970 germinated. How many seeds were sown?
Solution. From formula (1.4.1), it follows that $n=\frac{m}{W}$. Since $m=970, \quad W=0.97$, then $n=970 / 0.97=1000$. Therefore, 1000 seeds were sown.