MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
| 1. |
A function is defined by mapping f : A -> B such that A contains m elements and B contains n elements and 1≤n≤m then number of onto functions are?# |
| A. | <sub>r=1</sub>‚àë<sup>r=n</sup> <sup>n</sup>C<sub>r</sub> (-1)<sup>n-r</sup> r<sup>m</sup> |
| B. | <sub>r=1</sub>‚àë<sup>r=n</sup> <sup>n</sup>C<sub>r</sub> (-1)<sup>n-r</sup> r<sup>n</sup> |
| C. | <sub>r=1</sub>‚àë<sup>r=n</sup> <sup>n</sup>C<sub>r</sub> (-1)<sup>m-r</sup> r<sup>n</sup> |
| D. | None of the mentioned |
| Answer» B. <sub>r=1</sub>‚Äö√Ñ√∂‚àö‚Ć‚àö¬¥<sup>r=n</sup> <sup>n</sup>C<sub>r</sub> (-1)<sup>n-r</sup> r<sup>n</sup> | |