diff --git a/matpltlib/10_subplots.ipynb b/matpltlib/10_subplots.ipynb
index d6d2accb..594a4a6c 100644
--- a/matpltlib/10_subplots.ipynb
+++ b/matpltlib/10_subplots.ipynb
@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<h1 align=\"center\", style=\"color:green\">Matplotlib Tutorial: Subplots</h1>"
+    "<h1 align=\"center\" style=\"color:green\">Matplotlib Tutorial: Subplots</h1>"
    ]
   },
   {
@@ -53,12 +53,14 @@
     "expense=[2800,3000,2800,3400]\n",
     "\n",
     "plt.subplot(2,1,1)\n",
-    "# income.set_title('Income')\n",
     "plt.bar(year,income)\n",
+    "plt.title('Income')\n",
     "\n",
+    "plt.subplot(2,1,2)\n",
+    "plt.bar(year,expense,color='green')\n",
+    "plt.title('Expense')\n",
     "\n",
-    "# plt.subplot(2,1,2)\n",
-    "# plt.bar(year,expense,color='green')"
+    "plt.tight_layout()\n"
    ]
   }
  ],
diff --git a/matpltlib/4_bar_chart/4_bar_chart.ipynb b/matpltlib/4_bar_chart/4_bar_chart.ipynb
index 201741b3..6126a315 100644
--- a/matpltlib/4_bar_chart/4_bar_chart.ipynb
+++ b/matpltlib/4_bar_chart/4_bar_chart.ipynb
@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<h1 align=\"center\", style=\"color:green\">Matplotlib Tutorial: Bar Chart</h1>"
+    "<h1 align=\"center\" style=\"color:green\">Matplotlib Tutorial: Bar Chart</h1>"
    ]
   },
   {
@@ -155,7 +155,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<h3>Horizontal bar chart using barh function<h3>"
+    "<h3>Horizontal bar chart using barh function</h3>"
    ]
   },
   {
@@ -189,7 +189,7 @@
     "\n",
     "plt.yticks(xpos,company)\n",
     "plt.ylabel(\"Revenue(Bln)\")\n",
-    "plt.title('US Technolog Stocks')\n",
+    "plt.title('US Technology Stocks')\n",
     "plt.legend()"
    ]
   }
diff --git a/matpltlib/5_histogram/5_histogram.ipynb b/matpltlib/5_histogram/5_histogram.ipynb
index d6f63ee6..d3837753 100644
--- a/matpltlib/5_histogram/5_histogram.ipynb
+++ b/matpltlib/5_histogram/5_histogram.ipynb
@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<h1 align=\"center\", style=\"color:green\">Matplotlib Tutorial: Histogram</h1>"
+    "<h1 align=\"center\" style=\"color:green\">Matplotlib Tutorial: Histogram</h1>"
    ]
   },
   {
@@ -122,7 +122,7 @@
     "<ul style=\"color:brown;font-weight: bold;\">\n",
     "    <li>80-100: Normal</li>\n",
     "    <li>100-125: Pre-diabetic</li>\n",
-    "    <li>80-100: Diabetic</li>\n",
+    "    <li>125-150: Diabetic</li>\n",
     "</ul>"
    ]
   },
diff --git a/matpltlib/6_pie_chart/6_pie_chart.ipynb b/matpltlib/6_pie_chart/6_pie_chart.ipynb
index 645fb955..efac2881 100644
--- a/matpltlib/6_pie_chart/6_pie_chart.ipynb
+++ b/matpltlib/6_pie_chart/6_pie_chart.ipynb
@@ -6,7 +6,7 @@
     "collapsed": true
    },
    "source": [
-    "<h1 align=\"center\", style=\"color:green\">Matplotlib Tutorial: Pie Charts</h1>"
+    "<h1 align=\"center\" style=\"color:green\">Matplotlib Tutorial: Pie Charts</h1>"
    ]
   },
   {