The table below gives the percentage distribution of female teachers in the primary schools of rural areas of various states and union territories $(U.T.)$ of India. Find the mean percentage of female teachers by all the three methods discussed in this section.
| Percentage of female teachers | $15$-$25$ | $25$-$35$ | $35$-$45$ | $45$-$55$ | $55$-$65$ | $65$-$75$ | $75$-$85$ |
| Number of States/$U$.$T$. | $6$ | $11$ | $7$ | $4$ | $4$ | $2$ | $1$ |