Question
Compute the general index number using the following data and interprete it :
| Items | $A$ | $B$ | $C$ | $D$ | $E$ | $F$ |
| Wight | $15$ | $23$ | $15$ | $25$ | $10$ | $12$ |
| Index No. | $220$ | $225$ | $190$ | $215$ | $198$ | $220$ |