Question 1179091
<pre><font face = "consolas" color = "indigo" size = 3><b>
Hi
29 units: 26(good) and 3(def)
purchase 4: Ways...
(a) all good units: 26C4 = 14,950
(b) two good units: (26C2)(3C2) = 975
(c) at least two good units:
 (26C2)(3C2) + (26C3)(3C1) + 26C4 = 14,950 + 7800 + 975
Wish You the Best in your Studies.
</font></b></pre>